WO2007051925A1 - Anti-vibration protection devices for a microphone - Google Patents

Anti-vibration protection devices for a microphone Download PDF

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Publication number
WO2007051925A1
WO2007051925A1 PCT/FR2006/002451 FR2006002451W WO2007051925A1 WO 2007051925 A1 WO2007051925 A1 WO 2007051925A1 FR 2006002451 W FR2006002451 W FR 2006002451W WO 2007051925 A1 WO2007051925 A1 WO 2007051925A1
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WO
WIPO (PCT)
Prior art keywords
microphone
insulators
cap
cradle
suspension
Prior art date
Application number
PCT/FR2006/002451
Other languages
French (fr)
Inventor
Philippe Chenevez
Original Assignee
Philippe Chenevez
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philippe Chenevez filed Critical Philippe Chenevez
Publication of WO2007051925A1 publication Critical patent/WO2007051925A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • H04R1/086—Protective screens, e.g. all weather or wind screens

Definitions

  • the present invention relates to the general field of microphones and more particularly that of their anti-vibration protection.
  • a rigid support (1) is a source of vibrations; a suspension (2) has essentially stiffness (2a) and damping (2b) characteristics; and a moving mass (3) has three degrees of freedom in translation and three in rotation.
  • a microphone its vibratory sensitivity is different for each degree of freedom and the suspension must provide the system with a set of resonance frequencies as low as possible, in relation to this sensitivity and the risk of excitation of each of modes, in order to guarantee a good compromise between a correct microphone hold and sufficient filtering.
  • the spring elements having essentially stiffness characteristics will be called “insulators”.
  • the term “microphone” denotes an entity or group of entities rigidly linked to each other, each having one or more capsules sensitive to acoustic and mechanical vibrations.
  • the proposed solution to the problems emerging from this state of the art consists of a main device for microphone suspension and an additional device for windshield hanger suspension, said devices being both intended for single vibratory isolation purposes. of microphone capsule.
  • the quality of the result is obtained above all by a particular implementation of insulators made of spring wire, and associated dampers.
  • the main device is a microphone suspension comprising: a bar rigidly connected to the vibrating support;
  • a cradle rigidly connected to said microphone; - two pairs of isolators each consisting of a portion of 'simply curved wire spring effect, with the exception of coil springs, the ends of said isolators each said pair being fitted on one side at the same point in said bar and recessed on the other side at two distinct points of said cradle, said insulators of the same pair being arranged symmetrically so that they cross without touching.
  • the main device is characterized in that the cradle consists of a single piece joining the pairs of insulators.
  • the main device is characterized in that the cradle consists of a profiled shaped piece and mounted so that it partially surrounds the microphone on a face ppposée to the bar.
  • the main device is equipped with four damping elements each having at least one point of contact on the central parts of the insulators which are respectively respectively associated with them, said elements being provided for combining the damping roles of the resonances. said insulators and damping the fundamental resonances of the complete modal system in its low frequency approximation.
  • the main device is characterized in that the damping elements consist of elongated parallelepipedal blocks made of Ethylene Propylene Diene Monomer.
  • the main device is characterized in that the electrical socket (3d) adapted to said microphone (3a) is integral with said cradle (3b).
  • the additional joint device is a suspension adapted to wind shields for microphone.
  • This device is intended for vibration protection of ⁇ apsule microphone. It comprises: - a four-star star-shaped frame, considered as rigid and rigidly fixed to the support so as to possibly removable, said armature being located inside said cap;
  • insulators consist of portions of simply curved wire spring effect, respectively embedded on one side in the ends of the branches of the frame, and the other at certain points of the cap.
  • the additional device is characterized in that its insulators are each constituted by a complete loop of generally circular shape. According to one embodiment, the additional device is characterized in that the interface zone between the support and said cap is filled by a flexible material provided to ensure sufficient freedom of relative movement between the cap and the support, while by maintaining the anti-wind properties normally offered by the cap.
  • the additional device is characterized in that said material is a silicone molded diaphragm forming a bellows.
  • Figure 1 is a symbolic representation of the notion of suspended mobile mass.
  • Figure 2 is a simplified representation of a helical spring and a spring consisting of a portion of simply curved wire. It illustrates the differences in behavior between the two models
  • Figure 3 is a symbolic representation of the vibratory problem posed by the addition of a windshield completely surrounding the microphone and its suspension.
  • Figure 4 is a symbolic representation of the solution to the problem in Figure 3, by separating the windshield.
  • Figure 5 is a perspective view of a simplified embodiment of the main device, in the case of a single body microphone of generally elongated cylindrical shape.
  • Figure 6 is a perspective view of a simplified embodiment of the main device, in the case of a microphone composed of two parallel entities, rigidly interconnected, of generally elongated cylindrical shapes.
  • Figure 7 is a perspective view of a simplified embodiment of the main device, in the case of a microphone composed of two parallel entities, rigidly interconnected, of generally short cylindrical shapes.
  • Figure 8 is a perspective view of a detail of an embodiment of the main device, relating to the dampers and the stop system.
  • Figure 9 is a top view of a detail of an embodiment of the main device, relating to the dampers.
  • Figure 10 is a perspective view of a detail of an embodiment of the main device, relating to an electrical socket secured to the cradle.
  • Figure 11 is a perspective view of an embodiment of the main device, in the case of a body and capsule microphone of elongated cylindrical shape.
  • Figure 12 is a perspective view of an embodiment of the additional joint suspension device adapted to the wind shields for microphone, presented alone.
  • Figure 13 is a perspective view of an embodiment of the main device and the additional device jointly presented.
  • FIG. 1 illustrates the general principle of mobile mass (3) suspended and isolated from the vibrations of the support (1) by insulators (2a) and dampers (2b).
  • the ratio of vibration amplitudes of . the moving mass and those of the support is called transmissibility.
  • metal such as steel has a much more constant Young's modulus even for large elongations, which ensures a good quality of vibration filtering independently of the static position of the moving mass, due to the gravitational effect.
  • FIG. 4 thus illustrates the principle of vibratory decoupling of the cap, by the use of insulators (2o) and dampers (2d), thus limiting the transmission of the vibration acoustically.
  • FIG. 5 shows an example of a single body microphone (3a) of generally elongated cylindrical shape, suspended by a double pair of wire insulators (2a).
  • the elements are now specified and referenced as follows: -
  • the support is a rigid assembly, consisting of a base, such as the end of a pole (la), an optional ball (Ib) and a bar (Ic) for fixing the insulators.
  • the total mobile mass is in fact made of the microphone (3a) and its cradle (3b) rigidly fixed thereto by any means.
  • each isolator (2a) partially surrounds the microphone about three quarters of a turn.
  • the ends are embedded on one side at the same point (Id) of the support, and on the other. side at two distinct points (3c) of the cradle (3b), so that the insulators cross without touching.
  • the cradle (3b) rigidly connected to the microphone by any means, consists of a single profiled part partially surrounding the microphone. The fact that it consists of a single piece allows to bring together the two pairs of insulators to make them less vulnerable, especially when storing and transporting the suspension. In this configuration, the cradle (3b) is in contact with the microphone (3a) on a face opposite to the bar (Ic), which gives a maximum guard between the microphone (3a) and the bar (Ic).
  • the microphone shown may, for example, have a sensitive capsule on one side and an electrical socket on the other. It can also have a sensitive capsule on each side in the case of a stereo microphone.
  • the overall decrease in resonant frequencies is directly correlated to the decrease in the sections of the wires used or to the increase in their lengths.
  • the relative decrease of a translation resonance frequency is mainly correlated with an increase in the size of a loop or a curvature.
  • the relative decrease in the rotation resonance frequency of the microphone around its axis is mainly correlated to the spacing of the fixing points (3c) insulators of the same pair, along a circumference around the microphone.
  • the relative decrease in the resonance frequency of the two other possible rotations is directly correlated to the approximation of the two pairs of insulators.
  • Figures 6 and 7 show examples of suspensions provided for multi-body microphones.
  • the precise and complete reasons that determine the characteristics of insulators depend on many factors and are not detailed.
  • Figure 6 shows a double microphone (3a) composed of two elongated generally cylindrical bodies, rigidly connected by the double cradle (3b) and suspended from the support (1) by the insulators (2a).
  • the fixing points (3c) of the insulators (2a), microphone side are located on the part of the cradle farthest from the support (1).
  • FIG. 7 shows a double microphone (3a) composed of two generally short cylindrical bodies, suspended from the support (1) by the insulators (2a) and coupled by a specific cradle (3b) allowing to sufficiently move the two pairs of insulators (2a) away from each other.
  • the characteristics of each pair of insulators are different in view of the asymmetry of the microphone. The masses being unequally distributed, the pair of insulators located at the back of the microphone (on the right in the figure) is appreciably softer than that at the front.
  • Insulators made of wire have the disadvantage of own resonances, values much higher than those of. complete system, which essentially depend on their intrinsic characteristics (mass, stiffness).
  • the ends (attachment points) and the central portions of the wires are respectively the nodes and the bellows of displacement of the vibration. In the absence of treatment, these resonances significantly degrade the quality of the filtering of the suspension.
  • the metal such as spring steel having a very low intrinsic damping the fundamental resonances of the complete system may have very high amplitudes in the absence of additional damping, which can cause ""awkward" microphone bouncing when handling its support (pole held by hand).
  • FIG. 8 shows the detail of a pair of insulators, which takes up part of the configuration shown in FIG. 5.
  • Two flexible dampers (2b) of elongated parallelepipedal shapes are arranged in such a way that they absorb as much as possible the vibration.
  • a stop (the) damping material visible at the bottom of the figure, is necessary in case of shock or excessive displacement of the microphone.
  • the two dampers (2b) presented from above in Figure 9 show the bridge they form between the nodes (cradle) and vibration bellies (central parts of the son). On the other hand, this figure makes it possible to visualize the way in which the threads cross without contact.
  • These dampers also have the role of limiting the amplitudes of the frequencies of fundamental resonances of the different modes of the complete system.
  • the desired damping level is thus adjustable by the choice of the nature of the material, but also by the section of the dampers.
  • Figure 10 shows a version of this variant of the main device where the plug (3d) is fixed to the cradle (3b) by lugs (3e) thus providing the opportunity for it to pivot slightly about the axis passing through these pins.
  • a compression seal (not visible), concealed between the socket and the cradle, then makes it possible to firmly clamp the microphone and the socket against the cradle, after insertion of the microphone into the socket. For reasons of readability, the electric wire is not shown. **
  • FIG 11 shows a concrete example of cardioid monophonic microphone suspension (3a), having a maximum acoustic and vibratory sensitivity in its main Z-axis (see Cartesian reference).
  • the microphone is:
  • the support (1) is, in this case, consisting of a pole (la) whose visible end is fixed to a ball (Ib), itself attached to the support bar (Ic) equipped with holes (If) to shift the microphone relative to the main axis of the pole.
  • the individual wind protection (3g) does not degrade the anti-vibration quality of the suspension.
  • Shock absorbers (2b) 4 flexible parallelepipeds of 24 x 6 x 4 mm in EPDM (Ethylene Propylene Diene Monomer).
  • the two pairs of insulators before -back are distant to each other to the maximum.
  • the cradle (3b) is so dimensioned that the plug (3d) is housed at the end thereof, without exceeding it.
  • the socket is made integral with the cradle by two fixing lugs (3e).
  • the elastic wire tie (3f) allows quick and efficient microphone placement.
  • Figure 12 provides a perspective of the additional joint device, represented alone.
  • the mobile mass to suspend is the windshield (3h) itself.
  • the physical characteristics of this cap does not are not described, especially those that would have utility as to its essential vocation of protection against wind. Nevertheless, it is imperative that the main structure of this cap is considered to be .rigid considering the flexibility of the insulators used, so that they play their full role.
  • the cap is shown on one half of its volume, thus revealing the elements of the device, located inside this cap- A frame (Ig) in the form of a four-pointed star is rigidly fixed to the support , possibly dismountable.
  • the four insulators (2c) consist of spring-loaded wire loops, respectively embedded on one side in the ends (Ih) of the arms of the armature, and on the other in certain points (3i) of the cap. .
  • the insulators (2c) are respectively associated with dampers (2d) fixed on one side to the central parts of the loops and on the other side to certain points of the cover (not referenced). These dampers attenuate the resonances of the insulators, as well as the fundamental resonances of the complete modal system (ballotings of the cap). For reasons of readability, the dampers associated with isolators shown at the bottom of the figure are not shown.
  • the windshield Since the windshield is considered rigid, its relative freedom of movement can only be preserved by specifically treating the interface zone between the cap (3h) and the pole (1a) while ensuring continuity of the anti-wind protection. Wind normally brought by this cap, in an area where the acoustic transparency is not a priority.
  • this zone is filled with a silicone molded membrane (Ii) forming a bellows.
  • Shock absorbers (2d) 4 flexible parallelepipeds of 30 x 6 x 6 mm in EPDM (Ethylene Propylene Diene Monomer).
  • the transfer function obtained in the presence of the unsprung cap shows a degradation of the order of 10 to 20 dB depending on the modes of excitation, between 20 and 200 Hz.
  • Figure 13 gives an overview of the two devices used together. They are capable of a large number of variants adapted to various shapes, sizes and characteristics of microphones and windshields.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Vibration Prevention Devices (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

The invention relates to a main device for suspending a microphone and a joint additional suspending device matched to microphone wind protective cap, both being intended for providing anti-vibration protection for the microphone capsule. The main device comprises a small bar (1c) permitting the fixing of four insulators (2a) constituted of portions of springy metal wire each partially surrounding the microphone (3a), and crossing one another in pairs without touching. The joint additional device comprises a mounting part (1g) that permits the fixing of four insulators (2c), also constituted of portions of springy metal wire, provided for suspending an anti-wind cap (3h). The vibration systems of each of the devices are dampened by their respective damping elements (2b) (2d).

Description

DESCRIPTION DESCRIPTION
DISPOSITIFS DE PROTECTION ANTI-VIBRATOIRE POUR MICROPHONEMICROPHONE ANTI-VIBRATION PROTECTION DEVICES
La présente invention concerne le domaine général des microphones et plus particulièrement celui de leur protection anti-vibratoire.The present invention relates to the general field of microphones and more particularly that of their anti-vibration protection.
En première approche, une masse mobile isolée des vibrations de son support par une suspension est un problème mécanique dit de transmissibilité vibratoire dont la formulation scientifique ne sera pas explicitée. Un support rigide (1) est source de vibrations; une suspension (2) possède essentiellement des caractéristiques de raideur (2a) et d'amortissement (2b); et une masse mobile (3) possède trois degrés de liberté en translation et trois en rotation. Dans le cas d'un microphone, sa sensibilité vibratoire est différente pour chaque degré de liberté et la suspension doit assurer au système un ensemble de fréquences de résonance aussi basses que possible, en rapport avec cette sensibilité et le risque d'excitation de chacun des modes, afin de garantir un bon compromis entre un maintien correct du microphone et un filtrage suffisant.At first approach, a mobile mass isolated from the vibrations of its support by a suspension is a mechanical problem called vibratory transmissibility whose scientific formulation will not be explained. A rigid support (1) is a source of vibrations; a suspension (2) has essentially stiffness (2a) and damping (2b) characteristics; and a moving mass (3) has three degrees of freedom in translation and three in rotation. In the case of a microphone, its vibratory sensitivity is different for each degree of freedom and the suspension must provide the system with a set of resonance frequencies as low as possible, in relation to this sensitivity and the risk of excitation of each of modes, in order to guarantee a good compromise between a correct microphone hold and sufficient filtering.
Afin qu'il n'y ait pas de confusion de vocabulaire, les éléments ressort possédant essentiellement des caractéristiques de raideur seront appelés "isolateurs". De même, dans un souci de clarté rédactionnelle, le terme "microphone" désignera une entité ou un groupe d'entités rigidement liées entre elles, possédant chacune une ou plusieurs capsules sensibles aux vibrations acoustiques et mécaniques.So that there is no confusion of vocabulary, the spring elements having essentially stiffness characteristics will be called "insulators". Similarly, for the sake of editorial clarity, the term "microphone" denotes an entity or group of entities rigidly linked to each other, each having one or more capsules sensitive to acoustic and mechanical vibrations.
Les premières suspensions pour microphone sont apparues dans les années 1925-1930. Les isolateurs étaient alors constitués de vrais ressorts métalliques hélicoïdaux comme cela est clairement indiqué dans les brevets US1653109 et US1805362. Par leur nature hélicoïdale, ces ressorts ne peuvent assurer le maintien d'un microphone que dans la mesure où chacun d'entre eux travaille uniquement en extension dans son axe principal. Depuis les années 1930-1940, toutes les inventions de suspensions pour microphones intègrent des isolateurs à base de caoutchouc ou de matériaux élastomères, comme cela est par exemple décrit dans les brevets US2235505, "US2628289, US2920150, US3155780, US3653625, US4194096, DE3220643, JP57171898, US4396807, US4514598, US4791674 ou US6459802. L'usage de ces matériaux non métalliques offre des avantages certains (simplicité, plasticité, amortissement intrinsèque) , mais il est difficile de contrôler et surtout d'abaisser suffisamment certaines fréquences fondamentales du système masse-ressorts, préjudiciables à la qualité de l'isolation vibratoire, compte tenu de la nécessité de garantir une fermeté suffisante de maintien du microphone, notamment lorsque celui-ci est placé au bout d'une perche tenue à la main.The first microphone suspensions appeared in the years 1925-1930. The insulators were then made of true helicoidal metal springs as is clearly stated in US1653109 and US1805362. By their helical nature, these springs can maintain a microphone only to the extent that each of them works only in extension in its main axis. Since the years 1930-1940, all inventions of microphones suspensions incorporate insulators based on rubber or materials elastomers, as is described, for example, in patents US2235505, " US2628289, US2920150, US3155780, US3653625, US4194096, DE3220643, JP57171898, US4396807, US4514598, US4791674 or US6459802. The use of these nonmetallic materials offers certain advantages (simplicity , plasticity, intrinsic damping), but it is difficult to control and especially to lower sufficiently certain fundamental frequencies of the mass-spring system, detrimental to the quality of vibration isolation, given the need to guarantee a sufficient firmness of maintenance microphone, especially when it is placed at the end of a pole held by hand.
Conjointement à cette approche, dans le cas fréquent d'une prise de son en extérieur, l'ajout d'une coiffe anti-vent entourant complètement le microphone et sa suspension, peut entraîner une dégradation indirecte de la qualité "anti-vibratoire de cette suspension. Cette dégradation est due à une reprise acoustique de la vibration de l'enveloppe de cette coiffe rigidement fixée au support, par la capsule ou les capsules du microphone. Comme cela est clairement lisible sur les figures des brevets GB375246, US2520706, GB2085263, GB2184916 ou US4966252, les coiffes anti-vent sont rigidement fixées au support vibrant.In conjunction with this approach, in the frequent case of outdoor sound recording, the addition of a windshield completely surrounding the microphone and its suspension, may lead to an indirect degradation of the "anti-vibration" quality of this microphone. This degradation is due to an acoustic recovery of the vibration of the envelope of this cap rigidly fixed to the support, by the capsule or the capsules of the microphone As is clearly legible in the figures of patents GB375246, US2520706, GB2085263, GB2184916 or US4966252, the wind caps are rigidly attached to the vibrating support.
La solution proposée aux problèmes se dégageant de cet état de l'art, consiste en un dispositif principal de suspension de microphone et en un dispositif additionnel conjoint de suspension de coiffe anti-vent, lesdits dispositifs étant tous deux à vocation unique d'isolation vibratoire de capsule de microphone. La qualité du résultat est avant tout obtenue par une mise en oeuvre particulière d'isolateurs constitués de fil métallique à effet ressort, et d'amortisseurs associés.The proposed solution to the problems emerging from this state of the art, consists of a main device for microphone suspension and an additional device for windshield hanger suspension, said devices being both intended for single vibratory isolation purposes. of microphone capsule. The quality of the result is obtained above all by a particular implementation of insulators made of spring wire, and associated dampers.
Le dispositif principal est une suspension de microphone comprenant: - une barrette rigidement liée au support vibrant;The main device is a microphone suspension comprising: a bar rigidly connected to the vibrating support;
- un berceau rigidement lié audit microphone; - deux paires d'isolateurs constitués chacun d'une portion de 'fil métallique simplement galbé à effet ressort, à l'exception de ressorts hélicoïdaux, les extrémités desdits isolateurs de chacune desdites paires étant encastrées d'un côté en un même point dans ladite barrette et encastrées de l'autre côté en deux points distincts dudit berceau, lesdits isolateurs d'une même paire étant disposés symétriquement de telle sorte qu'ils se croisent sans se toucher.a cradle rigidly connected to said microphone; - two pairs of isolators each consisting of a portion of 'simply curved wire spring effect, with the exception of coil springs, the ends of said isolators each said pair being fitted on one side at the same point in said bar and recessed on the other side at two distinct points of said cradle, said insulators of the same pair being arranged symmetrically so that they cross without touching.
Selon un mode de réalisation, le dispositif principal est caractérisé en ce que le berceau est constitué d'une seule pièce réunissant les paires d'isolateurs.According to one embodiment, the main device is characterized in that the cradle consists of a single piece joining the pairs of insulators.
Selon un mode de réalisation, le dispositif principal est caractérisé en ce que le berceau est constitué d'une pièce de forme profilée et montée de telle sorte qu'elle entoure partiellement le microphone sur une face ppposée à la barrette. Selon un mode de réalisation, le dispositif principal est équipé de quatre éléments amortisseurs ayant chacun au moins un point de contact sur les parties centrales des isolateurs qui leur sont ainsi respectivement associés, lesdits éléments étant prévus pour combiner les rôles d'amortissement des résonances propres desdits isolateurs et d'amortissement des résonances fondamentales du système modal complet dans son approximation basses fréquences.According to one embodiment, the main device is characterized in that the cradle consists of a profiled shaped piece and mounted so that it partially surrounds the microphone on a face ppposée to the bar. According to one embodiment, the main device is equipped with four damping elements each having at least one point of contact on the central parts of the insulators which are respectively respectively associated with them, said elements being provided for combining the damping roles of the resonances. said insulators and damping the fundamental resonances of the complete modal system in its low frequency approximation.
Selon un mode de réalisation, le dispositif principal est caractérisé en ce que les éléments amortisseurs sont constitués de blocs parallélépipédiques allongés en Ethylène Propylène Diène Monomère.According to one embodiment, the main device is characterized in that the damping elements consist of elongated parallelepipedal blocks made of Ethylene Propylene Diene Monomer.
Selon un mode de réalisation, le dispositif principal est caractérisé en ce que la prise électrique (3d) adaptée audit microphone (3a) est solidaire dudit berceau (3b) .According to one embodiment, the main device is characterized in that the electrical socket (3d) adapted to said microphone (3a) is integral with said cradle (3b).
Le dispositif additionnel conjoint est une suspension adaptée aux coiffes de protection anti-vent pour microphone. Ce dispositif est à vocation de protection anti-vibratoire de σapsule de microphone. Il comprend: - une armature en forme d'étoile à quatre branches, considérée comme rigide et rigidement fixée au support de façon éventuellement démontable, ladite armature étant située à l'intérieur de ladite coiffe;The additional joint device is a suspension adapted to wind shields for microphone. This device is intended for vibration protection of σapsule microphone. It comprises: - a four-star star-shaped frame, considered as rigid and rigidly fixed to the support so as to possibly removable, said armature being located inside said cap;
- quatre isolateurs constitués de portions de fil métallique simplement galbé à effet ressort, respectivement encastrés d'un côté dans les extrémités des branches de l'armature, et de l'autre en certains points de la coiffe.- Four insulators consist of portions of simply curved wire spring effect, respectively embedded on one side in the ends of the branches of the frame, and the other at certain points of the cap.
Selon un mode de réalisation, le dispositif additionnel conjoint est caractérisé en ce que ses isolateurs sont chacun constitués d'une boucle complète de forme globalement circulaire. Selon un mode de réalisation, le dispositif additionnel conjoint est caractérisé par le fait que la zone d'interface entre le support et ladite coiffe est comblée par un matériau souple prévu pour assurer une liberté suffisante de mouvement relatif entre la coiffe et le support, tout en maintenant les propriétés anti-vent normalement offertes par la coiffe.According to one embodiment, the additional device is characterized in that its insulators are each constituted by a complete loop of generally circular shape. According to one embodiment, the additional device is characterized in that the interface zone between the support and said cap is filled by a flexible material provided to ensure sufficient freedom of relative movement between the cap and the support, while by maintaining the anti-wind properties normally offered by the cap.
Selon un mode de réalisation, le dispositif additionnel conjoint est caractérisé par le fait que ledit matériau est une membrane moulée en silicone formant un soufflet.According to one embodiment, the additional device is characterized in that said material is a silicone molded diaphragm forming a bellows.
La Figure 1 est une représentation symbolique de la notion de masse mobile suspendue.Figure 1 is a symbolic representation of the notion of suspended mobile mass.
La Figure 2 est une représentation simplifiée d'un ressort hélicoïdal et d'un ressort constitué d'une portion de fil métallique simplement galbé. Elle illustre les différences de comportement entre les deux modèlesFigure 2 is a simplified representation of a helical spring and a spring consisting of a portion of simply curved wire. It illustrates the differences in behavior between the two models
La Figure 3 est une représentation symbolique du problème vibratoire posé par l'ajout d'une coiffe anti-vent entourant complètement le microphone et sa suspension.Figure 3 is a symbolic representation of the vibratory problem posed by the addition of a windshield completely surrounding the microphone and its suspension.
La Figure 4 est une représentation symbolique de la solution apportée au problème posé à la Figure 3, par désolidarisation de la coiffe anti-vent.Figure 4 is a symbolic representation of the solution to the problem in Figure 3, by separating the windshield.
La Figure 5 est une vue en perspective d'un mode simplifié de réalisation du dispositif principal, dans le cas d'un microphone à corps unique de forme globalement cylindrique allongée. La Figure 6 est une vue en perspective d'un mode simplifié de réalisation du dispositif principal, dans le cas d'un microphone composé de deux entités parallèles, rigidement liées entre elles, de formes globalement cylindriques allongées.Figure 5 is a perspective view of a simplified embodiment of the main device, in the case of a single body microphone of generally elongated cylindrical shape. Figure 6 is a perspective view of a simplified embodiment of the main device, in the case of a microphone composed of two parallel entities, rigidly interconnected, of generally elongated cylindrical shapes.
La Figure 7 est une vue en perspective d'un mode simplifié de réalisation du dispositif principal, dans le cas d'un microphone composé de deux entités parallèles, rigidement liées entre elles, de formes globalement cylindriques courtes.Figure 7 is a perspective view of a simplified embodiment of the main device, in the case of a microphone composed of two parallel entities, rigidly interconnected, of generally short cylindrical shapes.
La Figure 8 est une vue en perspective d'un détail d'un mode de réalisation du dispositif principal, concernant les amortisseurs et le système de butée. La Figure 9 est une vue de dessus d'un détail d'un mode de réalisation du dispositif principal, concernant les amortisseurs.Figure 8 is a perspective view of a detail of an embodiment of the main device, relating to the dampers and the stop system. Figure 9 is a top view of a detail of an embodiment of the main device, relating to the dampers.
La Figure 10 est une vue en perspective d'un détail d'un mode de réalisation du dispositif principal, concernant une prise électrique solidaire du berceau. La Figure 11 est une vue en perspective d'un mode de réalisation du dispositif principal, dans le cas d^un microphone à corps et capsule unique de forme cylindrique allongée.Figure 10 is a perspective view of a detail of an embodiment of the main device, relating to an electrical socket secured to the cradle. Figure 11 is a perspective view of an embodiment of the main device, in the case of a body and capsule microphone of elongated cylindrical shape.
La Figure 12 est une vue en perspective d'un mode de réalisation du dispositif additionnel conjoint de suspension adaptée aux coiffes de protection anti-vent pour microphone, présenté seul.Figure 12 is a perspective view of an embodiment of the additional joint suspension device adapted to the wind shields for microphone, presented alone.
La Figure 13 est une vue en perspective d'un mode de réalisation du dispositif principal et du dispositif additionnel conjoint, présentés ensemble.Figure 13 is a perspective view of an embodiment of the main device and the additional device jointly presented.
Le point commun des deux dispositifs est la mise en œuvre particulière de suspension de masse mobile. La Figure 1 illustre le principe général de masse mobile (3) suspendue et isolée des vibrations du support (1) par des isolateurs (2a) et des amortisseurs (2b) . Le rapport entre les amplitudes de vibrations de. la masse mobile et celles du support s'appelle la transmissibilité .The common point of the two devices is the particular implementation of mobile mass suspension. FIG. 1 illustrates the general principle of mobile mass (3) suspended and isolated from the vibrations of the support (1) by insulators (2a) and dampers (2b). The ratio of vibration amplitudes of . the moving mass and those of the support is called transmissibility.
Dans un modèle théorique simplifié à un degré de liberté, il existe des courbes dont le profil en fonction de la fréquence d'excitation est connu. Ces courbes sont des points de repère très utiles pour apprécier la qualité d'une suspension. Comme illustré à la Figure 2, un ressort spirale (4), offre sa caractéristique de raideur essentielle dans son axe, ce qui est également le cas d'un simple élastique en caoutchouc ou d'un ruban en matériau élastpmère souple. Par contre, un fil métallique simplement formé, à effet ressort (5) , offre des caractéristiques de raideur plus complexes selon son profil et selon les- forces (F) auxquelles il est soumis. C'est cette anisotropie de comportement qui permet de jouer plus finement sur la répartition des fréquences de résonances selon les modes dans une suspension. D'autre part, comparativement à d'autres matières à effet ressort, naturelles ou synthétiques, le métal tel que l'acier possède un module d'Young bien plus constant même pour de grandes élongations, ce qui permet de garantir une bonne qualité de filtrage vibratoire indépendamment de la position statique de la masse mobile, due à l'effet de gravité.In a simplified theoretical model with a degree of freedom, there are curves whose profile as a function of the excitation frequency is known. These curves are very useful reference points to appreciate the quality of a suspension. As illustrated in FIG. 2, a spiral spring (4) offers its characteristic of essential stiffness in its axis, which is also the case of a simple rubber elastic or a ribbon of flexible elastomer material. On the other hand, a simply formed spring-loaded wire (5) offers more complex stiffness characteristics depending on its profile and the forces (F) to which it is subjected. It is this anisotropy of behavior that makes it possible to play more finely on the distribution of the frequencies of resonances according to the modes in a suspension. On the other hand, compared with other spring-like materials, natural or synthetic, metal such as steel has a much more constant Young's modulus even for large elongations, which ensures a good quality of vibration filtering independently of the static position of the moving mass, due to the gravitational effect.
Les Figures 3 et 4 permettent de justifier la nécessité du dispositif additionnel conjoint, dans le cas où le microphone et sa suspension sont entourés d'une coiffe de protection anti-vent (3h) . En l'absence de coiffe, une bonne suspension garantit une bonne isolation vibratoire de capsule de microphone. En présence d'une coiffe rigidement liée au support, tel qu'illustré à la Figure 3, l'enveloppe se comporte comme une peau de tambour qui transmet les vibrations du support et fait vibrer la ou les capsules du microphone par voie acoustique. La dégradation indirecte de la qualité de la suspension est donc d'autant plus importante que cette qualité est grande. La Figure 4 illustre donc le principe de découplage vibratoire de coiffe, par la mise en œuvre d'isolateurs (2o) et d'amortisseurs (2d), limitant ainsi la transmission de la vibration par voie acoustique»Figures 3 and 4 justify the need for additional joint device, in the case where the microphone and its suspension are surrounded by a windshield protection (3h). In the absence of a cap, a good suspension guarantees good vibratory isolation of the microphone capsule. In the presence of a cap rigidly connected to the support, as shown in Figure 3, the envelope behaves like a drum skin that transmits the vibrations of the support and vibrates the capsule or microphone acoustically. Indirect degradation of the quality of the suspension is therefore all the more important as this quality is great. FIG. 4 thus illustrates the principle of vibratory decoupling of the cap, by the use of insulators (2o) and dampers (2d), thus limiting the transmission of the vibration acoustically.
La Figure 5 montre un exemple de microphone (3a) à corps unique de forme générale cylindrique allongée, suspendu par une double paire d'isolateurs en fils métalliques (2a). Les éléments sont maintenant précisés et référencés comme suit : - Le support est un ensemble rigide, constitué d'une base, comme l'extrémité d'une perche (la), d'une rotule éventuelle (Ib) et d'une barrette (Ic) permettant la fixation des isolateurs.Figure 5 shows an example of a single body microphone (3a) of generally elongated cylindrical shape, suspended by a double pair of wire insulators (2a). The elements are now specified and referenced as follows: - The support is a rigid assembly, consisting of a base, such as the end of a pole (la), an optional ball (Ib) and a bar (Ic) for fixing the insulators.
- La masse mobile totale est en fait constituée du microphone (3a) et de son berceau (3b) rigidement fixé à celui-ci par un moyen quelconque.- The total mobile mass is in fact made of the microphone (3a) and its cradle (3b) rigidly fixed thereto by any means.
Dans cet exemple, chaque isolateur (2a) entoure partiellement le microphone sur environ trois quarts de tour. Pour chaque paire d'isolateurs, le_s extrémités sont encastrées d'un côté en un même point (Id) du support, et de l'autre. côté en deux points distincts (3c) du berceau (3b) , de telle sorte que les isolateurs se croisent sans se toucher. Cette configuration est avantageuse pour les raisons suivantes:In this example, each isolator (2a) partially surrounds the microphone about three quarters of a turn. For each pair of insulators, the ends are embedded on one side at the same point (Id) of the support, and on the other. side at two distinct points (3c) of the cradle (3b), so that the insulators cross without touching. This configuration is advantageous for the following reasons:
- Maîtrise accrue des fréquences de résonance fondamentales du système modal complet, en particulier celle qui correspond à une rotation du microphone autour de "son axe principal. Cette fréquence de résonance de rotation peut ainsi être abaissée avec une bonne indépendance vis-à-vis des autres modes de résonance. - Effet de "bouclier" et de "ceinture de sécurité" autour du microphone.- Increased control of the fundamental resonance frequencies of the complete modal system, in particular that which corresponds to a rotation of the microphone around its main axis, which can thus lower this rotation resonance frequency with a good independence with respect to other resonance modes - "shield" and "seat belt" effect around the microphone.
- Optimisation de l'encombrement général du microphone suspendu .- Optimization of the overall size of the suspended microphone.
On remarque également que le berceau (3b) , rigidement lié au microphone par un moyen quelconque, est constitué d'une seule pièce profilée entourant partiellement le microphone. Le fait qu'il soit constitué d'une seule pièce permet de réunir les deux paires d'isolateurs afin de les rendre moins vulnérables, notamment lors du rangement et du transport de la suspension. Dans cette configuration, le berceau (3b) est au contact du microphone (3a) sur une face opposée à la barrette (Ic), ce qui donne une garde maximale entre le microphone (3a) et la barrette (Ic) .We also note that the cradle (3b), rigidly connected to the microphone by any means, consists of a single profiled part partially surrounding the microphone. The fact that it consists of a single piece allows to bring together the two pairs of insulators to make them less vulnerable, especially when storing and transporting the suspension. In this configuration, the cradle (3b) is in contact with the microphone (3a) on a face opposite to the bar (Ic), which gives a maximum guard between the microphone (3a) and the bar (Ic).
Il est à noter que le microphone représenté peut, par exemple, posséder une capsule sensible d'un côté et une prise électrique de l'autre. Il peut également posséder une capsule sensible de chaque côté dans le cas d'un microphone stéréophonique . Certaines caractéristiques des isolateurs (longueurs, sections, type de métal) doivent être adaptées aux objectifs visés (fréquences de résonances fondamentales du système modal) en fonction des caractéristiques du microphone (forme, taille, masse, sensibilité aux vibrations), ou aux contraintes d'utilisationIt should be noted that the microphone shown may, for example, have a sensitive capsule on one side and an electrical socket on the other. It can also have a sensitive capsule on each side in the case of a stereo microphone. Some characteristics of the insulators (lengths, sections, type of metal) must be adapted to the desired objectives (fundamental resonance frequencies of the modal system) according to the characteristics of the microphone (shape, size, mass, sensitivity to vibrations), or the constraints of the microphone. 'use
(fermeté du maintien) et de fabrication (coûts, simplicité) . Les paramètres de réglages sont nombreux et assez interdépendants, mais les règles les plus simples à respecter sont les suivantes:(firmness of the maintenance) and manufacturing (costs, simplicity). The setting parameters are numerous and quite interdependent, but the easiest rules to follow are:
- La diminution globale des fréquences de résonance est directement corrélée à la diminution des sections des fils utilisés ou à l'augmentation de leurs longueurs.The overall decrease in resonant frequencies is directly correlated to the decrease in the sections of the wires used or to the increase in their lengths.
- La diminution relative d'une fréquence de résonance de translation est principalement corrélée à une augmentation de la taille d'une boucle ou d'une courbure. - La diminution relative de la fréquence de résonance de rotation du microphone autour de son axe est principalement corrélée à l'écartement des points de fixation (3c) des isolateurs d'une même paire, le long d'une circonférence autour du microphone. - La diminution relative de la fréquence de résonance des deux autres rotations possibles est directement corrélée au rapprochement des deux paires d'isolateurs.The relative decrease of a translation resonance frequency is mainly correlated with an increase in the size of a loop or a curvature. - The relative decrease in the rotation resonance frequency of the microphone around its axis is mainly correlated to the spacing of the fixing points (3c) insulators of the same pair, along a circumference around the microphone. - The relative decrease in the resonance frequency of the two other possible rotations is directly correlated to the approximation of the two pairs of insulators.
Afin d'illustrer l 'adaptabilité du dispositif à différentes caractéristiques de microphones, les Figures 6 et 7 montrent des exemples de suspensions prévues pour microphones multi corps. Les raisons précises et complètes qui déterminent les caractéristiques des isolateurs dépendent de nombreux facteurs et ne sont pas détaillées. La Figure 6 montre un microphone double (3a) composé de deux corps globalement cylindriques allongés, rigidement reliés par le double berceau (3b) et suspendus au support (1) par les isolateurs (2a) . Dans cet exemple, les points de fixation (3c) des isolateurs (2a), côté microphone, sont situés sur la partie du berceau la plus éloignée du support (1) . La Figure 7 montre un microphone double (3a) composé de deux corps globalement cylindriques courts, suspendus au support (1) par les isolateurs (2a) et couplés par un berceau spécifique (3b) permettant d'éloigner suffisamment les deux paires d'isolateurs (2a) entre elles. Dans' ce nouvel exemple, les caractéristiques de chaque paire d'isolateurs sont différentes compte tenu de la dissymétrie du microphone. Les masses étant inégalement réparties, la paire d'isolateurs située à l'arrière du microphone (à droite sur la figure) est sensiblement plus souple que celle située à l'avant.In order to illustrate the adaptability of the device to different microphone characteristics, Figures 6 and 7 show examples of suspensions provided for multi-body microphones. The precise and complete reasons that determine the characteristics of insulators depend on many factors and are not detailed. Figure 6 shows a double microphone (3a) composed of two elongated generally cylindrical bodies, rigidly connected by the double cradle (3b) and suspended from the support (1) by the insulators (2a). In this example, the fixing points (3c) of the insulators (2a), microphone side, are located on the part of the cradle farthest from the support (1). FIG. 7 shows a double microphone (3a) composed of two generally short cylindrical bodies, suspended from the support (1) by the insulators (2a) and coupled by a specific cradle (3b) allowing to sufficiently move the two pairs of insulators (2a) away from each other. In 'this new example, the characteristics of each pair of insulators are different in view of the asymmetry of the microphone. The masses being unequally distributed, the pair of insulators located at the back of the microphone (on the right in the figure) is appreciably softer than that at the front.
Les isolateurs constitués de fil métallique présentent l'inconvénient de posséder des résonances propres, de valeurs nettement plus élevées que celles du. système complet, qui dépendent essentiellement de leurs caractéristiques intrinsèques (masse, raideur) . Dans le cas de ces résonances particulières, les extrémités (points de fixation) et les parties centrales des fils sont respectivement les nœuds et les ventres de déplacement de la vibration. En l'absence de traitement, ces résonances dégradent nettement la qualité du filtrage de la suspension.*^1 une façon plus générale, le métal tel que l'acier ressort possédant un amortissement intrinsèque très faible, les résonances fondamentales du système complet peuvent avoir des amplitudes très élevées en l'absence d'amortissement complémentaire, ce qui peut entraîner un "ballottement" gênant du microphone lors de la manipulation de son support (perche tenue à la main) . Ces problèmes sont donc résolus par l'emploi d'amortisseurs placés directement au conta,ct des fils, par collage ou autre méthode de fixation. La Figure 8 montre le détail d'une paire d'isolateurs, qui reprend une partie de la configuration présentée à la Figure 5. Deux amortisseurs souples (2b), de formes parallélépipédiques allongées, sont disposés de telle sorte qu'ils absorbent au maximum la vibration. Une butée (le) en matériau amortissant, visible en bas de la figure, est nécessaire en cas de choc ou de déplacement excessif du microphone. Les deux amortisseurs (2b) présentés vus de dessus à la Figure 9 montrent le pont qu'ils forment entre les nœuds (berceau) et les ventres de vibration (parties centrales des fils) . D'autre part, cette figure permet de visualiser la façon dont les fils se croisent sans contact. Ces amortisseurs ont également le rôle de limiter les amplitudes des fréquences de résonances fondamentales des différents modes du système complet. Le niveau d'amortissement souhaité est ainsi réglable par le choix de la nature du matériau, mais aussi par la section des amortisseurs.Insulators made of wire have the disadvantage of own resonances, values much higher than those of. complete system, which essentially depend on their intrinsic characteristics (mass, stiffness). In the case of these particular resonances, the ends (attachment points) and the central portions of the wires are respectively the nodes and the bellows of displacement of the vibration. In the absence of treatment, these resonances significantly degrade the quality of the filtering of the suspension. * ^ 1 More generally, the metal such as spring steel having a very low intrinsic damping the fundamental resonances of the complete system may have very high amplitudes in the absence of additional damping, which can cause ""awkward" microphone bouncing when handling its support (pole held by hand). These problems are thus solved by the use of dampers placed directly on the conta, and son, by gluing or other method of fixing. FIG. 8 shows the detail of a pair of insulators, which takes up part of the configuration shown in FIG. 5. Two flexible dampers (2b) of elongated parallelepipedal shapes are arranged in such a way that they absorb as much as possible the vibration. A stop (the) damping material, visible at the bottom of the figure, is necessary in case of shock or excessive displacement of the microphone. The two dampers (2b) presented from above in Figure 9 show the bridge they form between the nodes (cradle) and vibration bellies (central parts of the son). On the other hand, this figure makes it possible to visualize the way in which the threads cross without contact. These dampers also have the role of limiting the amplitudes of the frequencies of fundamental resonances of the different modes of the complete system. The desired damping level is thus adjustable by the choice of the nature of the material, but also by the section of the dampers.
Pour des raisons pratiques d'utilisation ou dans le cas où il serait souhaitable d'éloigner au maximum les paires d'isolateurs entre elles, il peut être utile de rendre la prise électrique solidaire du berceau. La Figure 10 présente une version de cette variante du dispositif principal où la prise (3d) est fixée au berceau (3b) par des ergots (3e) offrant ainsi la possibilité à celle-ci de pivoter légèrement autour de l'axe passant par ces ergots. Un joint de compression (non visible), dissimulé entre la prise et le berceau, permet alors de caler fermement le microphone et la prise contre le berceau, après introduction du microphone dans la prise. Pour des raisons de lisibilité, le fil électrique n'est pas représenté. ** For practical reasons of use or in the case where it would be desirable to keep the pairs of insulators as far as possible, it may be useful to make the electrical socket integral with the cradle. Figure 10 shows a version of this variant of the main device where the plug (3d) is fixed to the cradle (3b) by lugs (3e) thus providing the opportunity for it to pivot slightly about the axis passing through these pins. A compression seal (not visible), concealed between the socket and the cradle, then makes it possible to firmly clamp the microphone and the socket against the cradle, after insertion of the microphone into the socket. For reasons of readability, the electric wire is not shown. **
La Figure 11 présente un cas concret de suspension pour microphone monophonique cardioïde (3a), possédant une sensibilité acoustique et vibratoire maximale dans son axe principal en Z (voir le repère cartésien) . Le microphone est:Figure 11 shows a concrete example of cardioid monophonic microphone suspension (3a), having a maximum acoustic and vibratory sensitivity in its main Z-axis (see Cartesian reference). The microphone is:
- équipé d'une protection anti-vent individuelle (3g) directement accouplée à son corps,- equipped with an individual wind protection (3g) directly coupled to his body,
- fixé au berceau (3b) par une prise électrique solidaire (3d) et par une attache élastique (3f) ,- fixed to the cradle (3b) by an integral electrical outlet (3d) and by an elastic fastener (3f),
- isolé du support (1) par des isolateurs (2a) et des amortisseurs (2b) ,- isolated from the support (1) by insulators (2a) and dampers (2b),
- protégé contre les chocs par les butées (le) .- protected against shocks by stops (le).
Le support (1) est, dans ce cas, constitué d'une perche (la) dont l'extrémité visible est fixée à une rotule (Ib), elle-même fixée à la barrette support (Ic) équipée de trous (If) permettant de décaler le microphone par rapport à l'axe principal de la perche. Il est à noter que, dans Ce cas, la protection anti-vent individuelle (3g) ne dégrade en rien la qualité anti-vibratoire de la suspension. Par contre, cet élément de protection anti-ventThe support (1) is, in this case, consisting of a pole (la) whose visible end is fixed to a ball (Ib), itself attached to the support bar (Ic) equipped with holes (If) to shift the microphone relative to the main axis of the pole. It should be noted that, in this case, the individual wind protection (3g) does not degrade the anti-vibration quality of the suspension. By cons, this element of protection against wind
(3g) possède une masse propre et a donc une influence à prendre en compte dans le comportement du système. Caractéristiques détaillées de cet exemple:(3g) has a clean mass and therefore has an influence to take into account in the behavior of the system. Detailed features of this example:
Microphone (3a) : Longueur 13 cm sans prise ni protection antivent; Diamètre 20 mm; Masse 120 g avec prise, berceau et protection anti-vent individuelle; Isolateurs (2a) : 4 portions de fil de section circulaire en acier ressort à 1% de carbone; Longueur 105 mm chacun; Diamètre 0.8 mm; Croisement des fils sur 35mm pour chaque paire.Microphone (3a): Length 13 cm without plug or protection; Diameter 20 mm; Weight 120 g with plug, cradle and individual wind protection; Insulators (2a): 4 portions of circular section wire of 1% carbon spring steel; Length 105 mm each; Diameter 0.8 mm; 35mm crossover for each pair.
Amortisseurs (2b) : 4 parallélépipèdes souples de 24 x 6 x 4 mm en EPDM (Ëthylène Propylène Diène Monomère) . Berceau (3b) et barrette (Ic): longueur 8.5 cm.Shock absorbers (2b): 4 flexible parallelepipeds of 24 x 6 x 4 mm in EPDM (Ethylene Propylene Diene Monomer). Cradle (3b) and bar (Ic): length 8.5 cm.
Dans le but d'affermir au maximum le maintien du microphone lorsqu'il oscille en rotation dans les plans XZ ou YZ, sans rien changer à son comportement dans les' modes de translation X, Y et Z, les deux paires d'isolateurs avant-arrière sont éloignées entre elles au maximum. Le berceau (3b) est ainsi dimensionné de telle sorte que la prise (3d) se loge à l'extrémité de celui-ci, sans le dépasser. Pour faciliter la mise en place et le maintien du microphone, la prise est rendue solidaire du berceau par deux ergots de fixation (3e). L'attache par fil élastique (3f) permet une mise en place rapide et efficace du microphone.In order to strengthen maximally maintaining the microphone when oscillates in rotation in the XZ or YZ planes, without changing its behavior in the 'translational modes X, Y and Z, the two pairs of insulators before -back are distant to each other to the maximum. The cradle (3b) is so dimensioned that the plug (3d) is housed at the end thereof, without exceeding it. To facilitate the establishment and maintenance of the microphone, the socket is made integral with the cradle by two fixing lugs (3e). The elastic wire tie (3f) allows quick and efficient microphone placement.
Résonances de translation: 8 Hz en Z; 13 Hz en Y; 12 Hz en X. Résonances de rotation: 8 Hz en XZ; 9 Hz en YZ; 18 Hz en XY. Il est à noter que le microphone décrit est assez peu sensible en translation dans les axes X, Y et en rotation dans le plan XY. Ceci justifie qu'il ne soit pas nécessaire de contrôler trop efficacement les modes correspondants, c'est-à-dire de trop abaisser leurs fréquences de résonances, comparativement à celles des autres modes, Z en particulier. Résonances propres des isolateurs: 200 et 500 Hz. Atténuation vibratoire (transmissibilité) obtenue dans l'axe principal Z: -12 dB à 20 Hz, -40 dB à 100 Hz.Translational resonances: 8 Hz in Z; 13 Hz in Y; 12 Hz in X. Resonances of rotation: 8 Hz in XZ; 9 Hz in YZ; 18 Hz in XY. It should be noted that the microphone described is not very sensitive in translation in the X, Y and rotation axes in the XY plane. This justifies that it is not necessary to control the corresponding modes too effectively, that is to say, to lower their resonance frequencies too much, compared with those of the other modes, Z in particular. Resonances of the insulators: 200 and 500 Hz. Vibration attenuation (transmissibility) obtained in the main axis Z: -12 dB at 20 Hz, -40 dB at 100 Hz.
La Figure 12 offre une perspective du dispositif additionnel conjoint, représenté seul. Bien que la vocation de ce dispositif soit une protection anti-vibratoire indirecte de capsule de microphone, la masse mobile à suspendre est la coiffe anti-vent (3h) elle-même. Les caractéristiques physiques de cette coiffe ne sont pas décrites, notamment celles qui auraient une utilité quant à sa vocation essentielle de protection anti-vent. Malgré tout, il est impératif que la structure principale de cette coiffe soit considérée comme .rigide au regard de la souplesse des isolateurs utilisés, afin que ces derniers jouent pleinement leur rôle. Sur la figure, la coiffe est représentée sur une moitié de son volume, laissant ainsi apparaître les éléments du dispositif, situés a l'intérieur de cette coiffe- Une armature (Ig) en forme d'étoile à quatre branches est rigidement fixée au support, de façon éventuellement démontable. Les quatre isolateurs (2c) sont constitués de boucles de fil métallique à effet ressort, respectivement encastrés d'un côté dans les extrémités (Ih) des branches de l'armature, et de l'autre en certains points (3i) de la coiffe. Les isolateurs (2c) sont respectivement associés à des amortisseurs (2d) fixés d'un côté sur les parties centrales des boucles et de l'autre côté en certains points de ïa coiffe (non référencés) . Ces amortisseurs atténuent les résonances propres des isolateurs, ainsi que les résonances fondamentales du système modal complet (ballottements de la coiffe) . Pour des raisons de lisibilité, les amortisseurs associés aux isolateurs dessinés en bas de la figure ne sont pas représentés.Figure 12 provides a perspective of the additional joint device, represented alone. Although the purpose of this device is an indirect anti-vibratory protection of microphone capsule, the mobile mass to suspend is the windshield (3h) itself. The physical characteristics of this cap does not are not described, especially those that would have utility as to its essential vocation of protection against wind. Nevertheless, it is imperative that the main structure of this cap is considered to be .rigid considering the flexibility of the insulators used, so that they play their full role. In the figure, the cap is shown on one half of its volume, thus revealing the elements of the device, located inside this cap- A frame (Ig) in the form of a four-pointed star is rigidly fixed to the support , possibly dismountable. The four insulators (2c) consist of spring-loaded wire loops, respectively embedded on one side in the ends (Ih) of the arms of the armature, and on the other in certain points (3i) of the cap. . The insulators (2c) are respectively associated with dampers (2d) fixed on one side to the central parts of the loops and on the other side to certain points of the cover (not referenced). These dampers attenuate the resonances of the insulators, as well as the fundamental resonances of the complete modal system (ballotings of the cap). For reasons of readability, the dampers associated with isolators shown at the bottom of the figure are not shown.
La coiffe anti-vent étant considérée comme rigide, sa liberté de mouvement relatif ne peut être préservée qu'en traitant spécifiquement la zone d'interface entre la coiffe (3h) et la perche (la) en assurant une continuité de la protection anti-vent normalement apportée par cette coiffe, dans une zone où la transparence acoustique n'est pas une priorité. Sur l'exemple, cette zone est comblée d'une membrane moulée en silicone (Ii) formant un soufflet.Since the windshield is considered rigid, its relative freedom of movement can only be preserved by specifically treating the interface zone between the cap (3h) and the pole (1a) while ensuring continuity of the anti-wind protection. wind normally brought by this cap, in an area where the acoustic transparency is not a priority. In the example, this zone is filled with a silicone molded membrane (Ii) forming a bellows.
Les caractéristiques détaillées de cet exemple concret sont les suivantes:The detailed characteristics of this concrete example are:
Coiffe ovoïdale (3h) : longueur 24 cm; diamètre maximal 14 cm; masse 150g environ. Armature en étoile (Ig) : aluminium 3 mm d'épaisseur; taille moyenne 10 x 8 cm. Isolateurs (2c) : 4 portions de 12 cm en fil d'acier ressort à 1% de carbone/ à section circulaire de 0.8 mm de diamètre, en formes de boucles circulaires de 3 cm de diamètre.Ovoidal headdress (3h): length 24 cm; maximum diameter 14 cm; mass about 150g. Star armature (Ig): aluminum 3 mm thick; average size 10 x 8 cm. Insulators (2c): 4 portions of 12 cm steel wire spring 1% carbon / circular section 0.8 mm in diameter, in the form of circular loops 3 cm in diameter.
Amortisseurs (2d)_: 4 parallélépipèdes souples de 30 x 6 x 6 mm en EPDM (Ethylène Propylène Diène Monomère) .Shock absorbers (2d): 4 flexible parallelepipeds of 30 x 6 x 6 mm in EPDM (Ethylene Propylene Diene Monomer).
Interface (Ii) : membrane silicone lmm d'épaisseur formant un soufflet à symétrie de révolution ("onde" circulaire double alternance) ; diamètre extérieur 5 cm; épaisseur totale 2 cm. Ainsi constitué, le système modal complet offre 6 résonances fondamentales (trois translations et trois rotations) de fréquences comprises entre 8 et 10 Hz, très bien équilibrées et amorties. Le gain apporté par la mise en œuvre de ce dispositif additionnel conjoint dépend notamment beaucoup de la fréquence et des caractéristiques du microphone. L'analyse des fonctions de transfert mesurées entre la force d'excitation produite dans le support et le signal électrique délivré par un microphone cardioïde, correctement centré dans la coiffe, ont permis de tirer les conclusions suivantes:Interface (Ii): 1mm thick silicone membrane forming a bellows with symmetry of revolution ("wave" circular double alternation); outside diameter 5 cm; total thickness 2 cm. Thus constituted, the complete modal system offers 6 fundamental resonances (three translations and three rotations) of frequencies between 8 and 10 Hz, very well balanced and damped. The gain provided by the implementation of this additional additional device depends in particular on the frequency and characteristics of the microphone. The analysis of the transfer functions measured between the excitation force produced in the support and the electrical signal delivered by a cardioid microphone, correctly centered in the cap, made the following conclusions:
- La fonction de transfert obtenue en l'absence de coiffe est prise comme référence.- The transfer function obtained in the absence of a cap is taken as a reference.
- La fonction de transfert obtenue en présence de la coiffe non suspendue fait apparaître une dégradation de l'ordre de 10 à 20 dB selon les modes d'excitation, entre 20 et 200 Hz.- The transfer function obtained in the presence of the unsprung cap shows a degradation of the order of 10 to 20 dB depending on the modes of excitation, between 20 and 200 Hz.
- La fonction de transfert obtenue après suspension de la coiffe limite cette dégradation à des valeurs comprises entre 0 etThe transfer function obtained after suspension of the cap limits this degradation to values between 0 and
10 dB.10 dB.
La Figure 13 donne un aperçu des deux dispositifs utilisés conjointement. Ils sont susceptibles d'un grand nombre de variantes adaptées à diverses formes, tailles et caractéristiques de microphones et de coiffes anti-vent.Figure 13 gives an overview of the two devices used together. They are capable of a large number of variants adapted to various shapes, sizes and characteristics of microphones and windshields.
L'intérêt de l'invention réside en partie dans la simplicité des moyens, décrits tout au long du document, à mettre en œuvre pour une application industrielle. The advantage of the invention resides in part in the simplicity of the means, described throughout the document, to implement for an industrial application.

Claims

REVENDICATIONS
1. Suspension de microphone comprenant: - une barrette (Ic) rigidement liée au Support vibrant;Microphone suspension comprising: - a bar (Ic) rigidly connected to the vibrating support;
- un berceau (3b) rigidement lié audit microphone (3a);a cradle (3b) rigidly connected to said microphone (3a);
- deux paires d'isolateurs (2a) constitués chacun d'une portion de fil métallique simplement galbé à effet ressort, à l'exception de ressorts hélicoïdaux, les extrémités desdits isolateurs de chacune desdites paires étant encastrées d'un côté en un même point (Id) dans ladite barrette, et de l'autre en deux points distincts (3c) dudit berceau, lesdits isolateurs d'une mêmetwo pairs of insulators (2a) each consisting of a portion of simply curved spring wire, with the exception of helical springs, the ends of said insulators of each of said pairs being embedded on one side at the same point; (Id) in said bar, and on the other at two distinct points (3c) of said cradle, said insulators of a same
« paire étant disposés symétriquement de telle sorte qu'ils se croisent sans se toucher."Pair being arranged symmetrically so that they cross each other without touching each other.
2. Suspension selon la revendication 1, caractérisée en ce que ledit berceau (3b) est constitué d'une seule pièce réunissant lesdites paires.2. Suspension according to claim 1, characterized in that said cradle (3b) consists of a single piece joining said pairs.
3. Suspension selon la revendication 2, caractérisée en ce que ledit berceau (3b) est constitué d'une pièce de forme profilée et montée de telle sorte qu'elle entoure partiellement le microphone (3a) au contact de celui-ci sur une face opposée à ladite barrette (Ic) .3. Suspension according to claim 2, characterized in that said cradle (3b) consists of a shaped part and mounted such that it partially surrounds the microphone (3a) in contact with it on one side opposite said bar (Ic).
4. Suspension selon l'une quelconque des revendications précédentes, équipée de quatre éléments amortisseurs (2b) ayant chacun au moins un point de contact sur les parties centrales des isolateurs (2a) qui leur sont ainsi respectivement associés, lesdits éléments étant prévus pour combiner les rôles d'amortissement des résonances propres desdits isolateurs et d'amortissement des résonances fondamentales du système modal complet dans son approximation basses fréquences.4. Suspension according to any one of the preceding claims, equipped with four damping elements (2b) each having at least one contact point on the central parts of the insulators (2a) respectively associated with them respectively, said elements being provided to combine the damping roles of the resonances of said insulators and the damping of the fundamental resonances of the complete modal system in its low frequency approximation.
5, Suspension selon la revendication précédente, dans laquelle les éléments amortisseurs (2b) sont constitués de blocs parallélépipédiques allongés en Ethylène Propylène Diène Monomère. 5, Suspension according to the preceding claim, wherein the damping elements (2b) consist of elongated parallelepiped blocks of Ethylene Propylene Diene Monomer.
6. Suspension selon l'une quelconque des revendications précédentes, caractérisée par le fait que la prise électrique (3d) adaptée audit microphone (3a) est solidaire dudit berceau (3b) .6. Suspension according to any one of the preceding claims, characterized in that the electrical outlet (3d) adapted to said microphone (3a) is integral with said cradle (3b).
7 Dispositif de suspension adaptée aux coiffes de protection anti-vent pour microphone, ledit dispositif étant à vocation de protection anti-vibratoire de capsule de microphone, ledit dispositif étant associé conjointement à la suspension définie selon l'une quelconque des revendications précédentes, comprenant:7 A suspension device adapted to the wind shields for a microphone, said device being intended for the purpose of vibratory protection of a microphone capsule, said device being associated together with the suspension defined according to any one of the preceding claims, comprising:
- une armature (Ig) en forme d'étoile à quatre branches, considérée comme rigide et rigidement fixée au support de façon éventuellement démontable, ladite armature (Ig) étant située à l'intérieur de .ladite coiffe (3h) ; - quatre isolateurs (2c) constitués de portions de fil métallique simplement galbé à effet ressort, respectivement encastrés d'un côté dans les extrémités (Ih) desdites branches, et de l'autre en certains points (3i) de ladite coiffe (3h) .a four-pointed star-shaped armature (Ig), considered as rigid and rigidly fixed to the support, possibly dismountably, said armature (Ig) being situated inside said cap (3h); - Four insulators (2c) consist of portions of simply curved wire spring effect, respectively recessed on one side in the ends (Ih) of said branches, and the other at certain points (3i) of said cap (3h) .
8. Dispositif selon la revendication précédente, caractérisé en ce que les isolateurs (2c) sont chacun constitués d'une boucle complète de forme globalement circulaire.8. Device according to the preceding claim, characterized in that the insulators (2c) are each constituted by a complete loop of generally circular shape.
9. Dispositif selon l'une des deux revendications précédentes, caractérisé par le fait que la zone d'interface entre le support (1) et ladite coiffe (3h) est comblée par un matériau souple prévu pour assurer une liberté suffisante de mouvement relatif entre la coiffe (3h) et le support (1), et maintenir les propriétés anti-vent normalement offertes par la coiffe.9. Device according to one of the two preceding claims, characterized in that the interface area between the support (1) and said cap (3h) is filled by a flexible material provided to ensure sufficient freedom of relative movement between the cap (3h) and the support (1), and maintain the windproof properties normally offered by the cap.
10. Dispositif selon la revendication 9, caractérisé par le fait que ledit matériau est une membrane moulée en silicone (Ii) formant un soufflet. 10. Device according to claim 9, characterized in that said material is a silicone molded membrane (Ii) forming a bellows.
PCT/FR2006/002451 2005-11-04 2006-11-02 Anti-vibration protection devices for a microphone WO2007051925A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0511248 2005-11-04
FR0511248A FR2893213B1 (en) 2005-11-04 2005-11-04 ANTI-VIBRATION PROTECTION DEVICES FOR MICROPHONE.

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WO2007051925A1 true WO2007051925A1 (en) 2007-05-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8121333B2 (en) 2006-01-24 2012-02-21 Rycote Microphone Windshields Ltd. Suspension device for microphone
GB2529069A (en) * 2014-08-07 2016-02-10 Rycote Microphone Windshields Ltd Improved microphone windshield
TWI548285B (en) * 2015-03-13 2016-09-01 Taiwan Carol Electronics Co Ltd Active anti - vibration microphone
US9843852B2 (en) 2012-04-16 2017-12-12 Shure Acquisition Holdings, Inc. Shock mounting apparatus and method for reducing amount of shock

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3073351B1 (en) * 2017-11-09 2019-12-20 Cinela ANTI-WIND AND ANTI-VIBRATORY PROTECTION DEVICE FOR SOUND-TAKING MICROPHONE.

Citations (5)

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Publication number Priority date Publication date Assignee Title
GB2085263A (en) * 1980-07-01 1982-04-21 Quirke Patrick Adair Microphones
EP0374902A2 (en) * 1988-12-21 1990-06-27 Bschorr, Oskar, Dr. rer. nat. Microphone system for determining the direction and position of a sound source
EP0423858A2 (en) * 1989-09-26 1991-04-24 S. Schrier Mounting system to attach a microphone to a wind instrument
WO1994004009A1 (en) * 1992-08-05 1994-02-17 Erling Winsjansen Microphone mounting device
US6459802B1 (en) * 2000-06-30 2002-10-01 Garrit A. R. Young Microphone shock mount system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085263A (en) * 1980-07-01 1982-04-21 Quirke Patrick Adair Microphones
EP0374902A2 (en) * 1988-12-21 1990-06-27 Bschorr, Oskar, Dr. rer. nat. Microphone system for determining the direction and position of a sound source
EP0423858A2 (en) * 1989-09-26 1991-04-24 S. Schrier Mounting system to attach a microphone to a wind instrument
WO1994004009A1 (en) * 1992-08-05 1994-02-17 Erling Winsjansen Microphone mounting device
US6459802B1 (en) * 2000-06-30 2002-10-01 Garrit A. R. Young Microphone shock mount system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8121333B2 (en) 2006-01-24 2012-02-21 Rycote Microphone Windshields Ltd. Suspension device for microphone
US9843852B2 (en) 2012-04-16 2017-12-12 Shure Acquisition Holdings, Inc. Shock mounting apparatus and method for reducing amount of shock
GB2529069A (en) * 2014-08-07 2016-02-10 Rycote Microphone Windshields Ltd Improved microphone windshield
TWI548285B (en) * 2015-03-13 2016-09-01 Taiwan Carol Electronics Co Ltd Active anti - vibration microphone

Also Published As

Publication number Publication date
FR2893213B1 (en) 2007-12-28
FR2893213A1 (en) 2007-05-11

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