WO2015022579A2 - Verfahren zum betreiben einer anordnung aus schallwandlern nach dem prinzip der wellenfeldsynthese - Google Patents
Verfahren zum betreiben einer anordnung aus schallwandlern nach dem prinzip der wellenfeldsynthese Download PDFInfo
- Publication number
- WO2015022579A2 WO2015022579A2 PCT/IB2014/001814 IB2014001814W WO2015022579A2 WO 2015022579 A2 WO2015022579 A2 WO 2015022579A2 IB 2014001814 W IB2014001814 W IB 2014001814W WO 2015022579 A2 WO2015022579 A2 WO 2015022579A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transducers
- virtual sound
- sound
- wavefronts
- audience
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
- H04R3/14—Cross-over networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
- H04R2201/401—2D or 3D arrays of transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
- H04R2227/007—Electronic adaptation of audio signals to reverberation of the listening space for PA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
- H04S2420/13—Application of wave-field synthesis in stereophonic audio systems
Definitions
- the present invention relates to a method for operating an arrangement
- loudspeaker systems which are tailored to the special requirements of the supply of large public areas with sufficiently high acoustic energy, so-called public address or short PA systems.
- These are realized as loudspeaker units, typically designed as multipath systems, each with high efficiency matched to the transmission range.
- the designs used are individual loudspeaker units or loudspeaker units combined into a large loudspeaker, so-called line arrays. With them, it is possible with appropriate dimensioning to produce the required by the organizer sound pressure in the far away from the speaker units audience areas.
- the radiation is essentially the non-directional radiation of a point sound source
- the sound pressure systematically decreases with each doubling of the distance from the sound source to half, ie by 6 dB.
- line arrays generate cylinder waves. The surface of a cylinder only grows linearly with the radius, not square, like that of a sphere. Accordingly slower, namely with 3 dB per distance doubling, you take
- the sound can be aligned in the elevation plane. This reduces the amount of background noise, which at open-air events extends beyond the audience area into the surroundings, such as the B. residential areas, is emitted.
- the bass range is emitted non-directionally by separate subwoofers. The best way to keep the wave fronts off the audience area is if they can be aligned in the azimuth and elevation planes. Using the method described by AJ Berkhout in 1988 in [3]
- Wavefield synthesis will allow even more precise alignment of the wavefronts.
- the convolution can be transformed into an impulse response, or from the corresponding calculations of sound propagation time and level from the distance between a virtual sound source and the respective sound transducer in a model - based approach Signals would be obtained which a loudspeaker would receive from a microphone located immediately behind the position in a partition wall from a real sound source at the position of the virtual sound source, as if by a "curtain", the wavefront of a real sound source is reconstructed.
- Phantom sound sources in the psychoacoustic based method with the position of the listener.
- Elevation level be aligned directly on the audience area.
- a virtual sound source is positioned far behind the arrangement of sound transducers.
- Curvature of the wavefront then corresponds to the spherical cutout in the region of the arrangement of sound transducers.
- the device works from transducers in the bass as a
- the piston emitter which emerges from the individual emitters in the bass range, can work as fast as any individual loudspeaker.
- the on a large speaker membrane otherwise inevitable partial vibrations do not arise.
- this electronically controllable emission of sound has further advantages over fixed systems. Because of the more targeted alignment of the wavefronts, the proportion of direct sound is significantly increased in the listener in relation to the sound components reflected back diffusely by the reflection surfaces. This increases the clarity of the transmission and improves the
- Performance venue is essential for a high quality broadcast.
- a radiation with a low opening angle also solves the problem of conventional PA systems, which are often created near the stage area hazardous to health high sound pressure levels, if more distant public areas with sufficiently high
- Loudspeakers have the problem here, which simply avoids the air around the speaker unit in this area.
- the generated sound pressure is distributed in all directions, in the audience only a fraction of the generated energy arrives.
- Individual speaker chassis must remain much smaller in the bass range than the
- Sound transducers is sufficient, as a working resistance. This considerably improves the efficiency of the radiation. The effect is comparable to horn loudspeakers, where the sound guide prevents the air column from dodging. Again, the
- the advantage should be retained that in the audience areas far away from the arrangement of sound transducers according to the principle of wave-field synthesis, approximately the same sound pressure can be generated as in the areas directly in front of the stage.
- the associated transducer device typically includes an array of speakers, typically dynamic speakers, arranged in a flat surface.
- speakers typically dynamic speakers
- the associated transducer device typically includes an array of speakers, typically dynamic speakers, arranged in a flat surface.
- other transducer principles such as
- MEMS microelectromechanical systems
- a curvature of the surface or an angled arrangement of planar partial surfaces is also conceivable, even an irregular arrangement of the sound transducers at defined spatial points could generate a defined wavefront according to the principle of wave-field synthesis.
- a special case is the execution of the surface as a single row of speakers. In her the described method is only partially effective.
- Different audience areas can also be supplied with a different signal content or with adapted level and equalization values with the same signal content from a common device consisting of sound transducers. This makes it possible to generate near sound levels in remote audience areas as immediately before the stage area of a major event.
- the device for supplying an extended audience area does not emit a single wavefront that expands over the entire audience area in a wide viewing angle, but the area to be served is characterized by a multiplicity of individual virtual sound sources that emanate from the array
- Sound transducers are generated according to the principle of Wellenfeidsynthese, in narrow Radiation supplied. All of these virtual sound sources have the signal content of one virtual sound source, which would otherwise have to supply the entire public area.
- Another embodiment of the inventive solution is to delay the signals of virtual sources with the same signal content against each other so that their signals arrive at the same time at the point in the middle of the overlap region. This also minimizes comb filter effects in this area, but the coverage area may be better adapted to the shape of the audience area due to the greater freedom in positioning the virtual sound sources.
- Audience areas can be supplied with almost the same sound pressure level as the area immediately before, be satisfied by the fact that the levels of each
- Audience areas are emitted at a higher level.
- a separate equalization of the frequency response for example, to compensate for the drop in altitude by the airborne sound insulation for the more distant audience areas, is possible with the inventive solution.
- the other task which works more efficiently with a given device of transducers according to the principle of wave field synthesis every single transducer in the upper frequency range of the playback spectrum than in the reproduction of a single, broad-wave wavefront is, with the
- n virtual sound sources could then be spatially distributed in such a way that they could supply the original area with individual wavefronts radiated at a narrower angle.
- the level of each individual virtual sound source would then be the nth part of the level of the original one virtual source, nothing would have fundamentally changed in the circumstances.
- the proportional level of the spatially distributed virtual sound sources can now be raised with the signal content of the one original virtual sound source by the difference between the two values, in this case by +24 dB, without the individual sound transducers being overloaded.
- Sensitivity in an arrangement of sound transducers according to the principle of Wave field synthesis to realize sufficiently high sound levels in an extended audience area Only in the center of the arrangement of sound transducers remain in the process, the signals of the distributed virtual sound sources in phase, because only then the requirement can be met, that the wavefronts arrive in the overlap area with the same phase.
- Audience area creates a spatial impression.
- its respective signal content can also be radiated to different positions by two or more virtual sound sources according to the described method.
- FIGS. 1 to 4. The method is shown in FIGS. 1 to 4. It will be explained with reference to these drawings.
- Fig. 1 shows the radiation of an array of transducers according to the principle of wave field synthesis (1) in the virtual sound source (2) the entire
- the problem is solved by distributing the signal instead of from the single virtual sound source (2) from several virtual sound sources with the same signal content, in the sketch to the virtual sound sources (5), (6), (7) and (8) ,
- all virtual sound sources from such positions generate their wavefronts from which they are equidistant from the center of the respective, inevitable overlap region in the audience (9), (10) and (11).
- the overlapping virtual sound sources are on a common Radius positioned around the center of the overlap area.
- the surface of the wavefronts emanating from the virtual sound sources (5), (6), (7) and (8) increase much slower with the distance from (1) due to the small opening angle of the radiation before the arrangement of sound transducers (1) ), as the surface of a wavefront that would emanate from the single virtual sound source (2). As a result, its level decreases with distance. In addition, level and equalization can now be regulated separately for each subarea.
- Sound transducers (3) powered by the four virtual sound sources (5), (6), (7) and (8) are now chosen to be different in size.
- the different aperture angles of the wavefronts emanating from the virtual sound sources (5) and (6) now lead to these starting points no longer being able to be arranged on a common radius about the center of their overlapping region (9).
- the signal of the virtual sound source (6) is to be delayed by the time required for the sound to travel (dt). Thereby the sound speed has to be
- the virtual sound source (7) must be delayed so that the wavefronts in their overlap region (10) to the virtual sound source (6) arrive at the same time. Accordingly, the terms of (7) are first calculated for each individual transducer. Then, for each of the calculated values, the
- Total System Computed Runtime is subtracted from all computed runtimes in the system to establish the final values. This avoids any unnecessary latency of the overall system.
- FIG. 3 shows the phase relationships of the individual signals in the plane of the arrangement of sound transducers. The geometric relationships are the same as in FIG. 1.
- Wave field synthesis (1) behind the two virtual sound sources (2r) and (21) to produce a spatial representation. It would also be possible to arrange the arrangement
- Split sound transducer to arrange the virtual sound sources (21) and (2r) on a broader baseline. Regardless of whether such a split schedule is chosen, the method described for a single source can then be applied to each patch. In the sketch, this is drawn only for the left channel of the stereo playback. Again, (3) the audience area. The virtual sound sources (5), (6), (7) and (8) then reproduce from their starting points on the radii about the overlapping areas (9), (10) and (1) the signal of the left source. The right channel is a mirror image divided into individual virtual sound sources, for clarity, this is not shown in the sketch.
- a method for the distribution of virtual sound sources behind an array of sound transducers according to the principle of
- Audience area with the same audio signal content is not a single wavefront, which extends from a virtual sound source over an extended audience area is generated, but the same signal content of at least two virtual sound sources is generated, which are arranged their wavefronts only on a part of Audience area are aligned.
- the method is carried out so that the signal level at the upper end of the frequency range to be transmitted is lowered in the center of the array of acoustic transducers according to the principle of wave field synthesis, with the remaining area due to the incoherent addition of the individual signals a higher efficiency of sound generation to effect.
- the method is carried out so that the virtual sound sources with the same signal content from a point in the middle of the part in the
- the method is carried out in such a way that the shortest running time, which results from the calculation of the transit times between all virtual sound sources and all individual sound transducers, is subtracted from all calculated transit times.
- the method is carried out so that the levels of the virtual sound sources that supply the individual audience areas with the same signal content can be regulated separately and / or that the levels of the virtual sound sources that supply the individual audience areas with the same signal content, to be straightened separately.
- the method is carried out in such a way that individual signal contents which are limited to the audience area supplied by this virtual sound source can be mixed with the wavefronts of individual virtual sound sources which reproduce the signal content of the primary virtual sound source from discrete positions ,
- the method is carried out in such a way that two or more virtual sound sources, which supply the entire audience area with different signals from different positions in order to generate a spatial representation, are replaced by at least two virtual sound sources arranged in this way their wavefronts are aligned with smaller opening angles only on a part of the audience area.
- the method is carried out such that the temperature and / or the wind direction and speed in the audience area is measured, in order to counteract dispersion or deflection of the wave fronts by a corresponding adaptation of the parameters for generating the wavefronts.
- a device of acoustic transducers according to the principle of wave field synthesis is suitable for the above-described methods
- Sound transducers is fitted or left free, so that the arrangement of sound transducers can also arranged a frame used for an associated image reproduction area.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Circuit For Audible Band Transducer (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/911,443 US9843864B2 (en) | 2013-08-10 | 2014-09-11 | Method for operating an arrangement of sound transducers according to the wave field synthesis principle |
EP14806713.5A EP3058762B1 (de) | 2013-08-10 | 2014-09-11 | Verfahren zum betreiben einer anordnung aus schallwandlern nach dem prinzip der wellenfeldsynthese |
DE112014003700.1T DE112014003700A5 (de) | 2013-08-10 | 2014-09-11 | Verfahren zum Betreiben einer Anordnung aus Schallwandlern nach dem Prinzip der Wellenfeldsynthese |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013013378.5 | 2013-08-10 | ||
DE102013013378.5A DE102013013378A1 (de) | 2013-08-10 | 2013-08-10 | Aufteilung virtueller Schallquellen |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2015022579A2 true WO2015022579A2 (de) | 2015-02-19 |
WO2015022579A3 WO2015022579A3 (de) | 2015-05-07 |
Family
ID=52007228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2014/001814 WO2015022579A2 (de) | 2013-08-10 | 2014-09-11 | Verfahren zum betreiben einer anordnung aus schallwandlern nach dem prinzip der wellenfeldsynthese |
Country Status (4)
Country | Link |
---|---|
US (1) | US9843864B2 (de) |
EP (1) | EP3058762B1 (de) |
DE (2) | DE102013013378A1 (de) |
WO (1) | WO2015022579A2 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020249675A1 (de) | 2019-06-13 | 2020-12-17 | Holoplot Gmbh | Vorrichtung und verfahren zur beschallung eines räumlichen bereichs |
DE102021207302A1 (de) | 2021-07-09 | 2023-01-12 | Holoplot Gmbh | Verfahren und Vorrichtung zur Beschallung mindestens eines Publikumsbereiches |
WO2024099733A1 (de) | 2022-11-09 | 2024-05-16 | Holoplot Gmbh | Verfahren zur richtungsabhängigen korrektur des frequenzganges von schallwellenfronten |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013015160A1 (de) | 2013-09-11 | 2015-03-12 | Advanced Acoustic Sf Gmbh | Integriertes System aus einer modular aufgebauten, zweidimensionalen WFS Schallwandler Anordnung und einer LED Bildwiedergabe |
DE102019106427B4 (de) * | 2019-03-13 | 2022-04-28 | Bundesrepublik Deutschland, vertreten durch den Bundesminister für Wirtschaft und Energie, dieser vertreten durch den Präsidenten der Bundesanstalt für Materialforschung und –prüfung (BAM) | Wandler und Wandleranordnung für Ultraschall-Prüfkopfsysteme, Ultraschall-Prüfkopfsystem und Prüfverfahren |
CN111929365B (zh) * | 2020-08-07 | 2023-08-22 | 广东汕头超声电子股份有限公司 | 一种超声成像检测显示方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005001395A1 (de) | 2004-01-17 | 2005-08-11 | Helmut Oellers | Transformation des frühen Schallfeldes |
US6936524B2 (en) | 2003-11-05 | 2005-08-30 | Akustica, Inc. | Ultrathin form factor MEMS microphones and microspeakers |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2847376B1 (fr) * | 2002-11-19 | 2005-02-04 | France Telecom | Procede de traitement de donnees sonores et dispositif d'acquisition sonore mettant en oeuvre ce procede |
JP4127156B2 (ja) | 2003-08-08 | 2008-07-30 | ヤマハ株式会社 | オーディオ再生装置、ラインアレイスピーカユニットおよびオーディオ再生方法 |
WO2005117483A1 (en) * | 2004-05-25 | 2005-12-08 | Huonlabs Pty Ltd | Audio apparatus and method |
JP4625671B2 (ja) | 2004-10-12 | 2011-02-02 | ソニー株式会社 | オーディオ信号の再生方法およびその再生装置 |
-
2013
- 2013-08-10 DE DE102013013378.5A patent/DE102013013378A1/de not_active Ceased
-
2014
- 2014-09-11 WO PCT/IB2014/001814 patent/WO2015022579A2/de active Application Filing
- 2014-09-11 DE DE112014003700.1T patent/DE112014003700A5/de not_active Withdrawn
- 2014-09-11 EP EP14806713.5A patent/EP3058762B1/de active Active
- 2014-09-11 US US14/911,443 patent/US9843864B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6936524B2 (en) | 2003-11-05 | 2005-08-30 | Akustica, Inc. | Ultrathin form factor MEMS microphones and microspeakers |
DE102005001395A1 (de) | 2004-01-17 | 2005-08-11 | Helmut Oellers | Transformation des frühen Schallfeldes |
Non-Patent Citations (2)
Title |
---|
BERKHOUT, A.J.: "A holographic approach to acoustic control", JOURNAL OF THE AUDIO ENGINEERING SOCIETY, vol. 36, no. 12, December 1988 (1988-12-01), pages 977 - 995 |
JOHN J. NEUMANN, JR.; KAIGHAM J. GABRIEL, CMOS-MEMS MEMBRANE FOR AUDIO-FREQUENCY ACOUSTIC ACUATION, 2001, pages 236 - 239 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020249675A1 (de) | 2019-06-13 | 2020-12-17 | Holoplot Gmbh | Vorrichtung und verfahren zur beschallung eines räumlichen bereichs |
DE102021207302A1 (de) | 2021-07-09 | 2023-01-12 | Holoplot Gmbh | Verfahren und Vorrichtung zur Beschallung mindestens eines Publikumsbereiches |
WO2023280982A1 (de) | 2021-07-09 | 2023-01-12 | Holoplot Gmbh | Verfahren und vorrichtung zur beschallung mindestens eines publikumsbereiches |
WO2024099733A1 (de) | 2022-11-09 | 2024-05-16 | Holoplot Gmbh | Verfahren zur richtungsabhängigen korrektur des frequenzganges von schallwellenfronten |
DE102022129642A1 (de) | 2022-11-09 | 2024-05-16 | Holoplot Gmbh | Verfahren zur richtungsabhängigen Korrektur des Frequenzganges von Schallwellenfronten |
Also Published As
Publication number | Publication date |
---|---|
EP3058762A2 (de) | 2016-08-24 |
EP3058762B1 (de) | 2020-11-04 |
DE102013013378A1 (de) | 2015-02-12 |
US9843864B2 (en) | 2017-12-12 |
WO2015022579A3 (de) | 2015-05-07 |
US20160205474A1 (en) | 2016-07-14 |
DE112014003700A5 (de) | 2016-06-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3058762B1 (de) | Verfahren zum betreiben einer anordnung aus schallwandlern nach dem prinzip der wellenfeldsynthese | |
DE2910117C2 (de) | Lautsprecherkombination zur Wiedergabe eines zwei- oder mehrkanalig übertragenen Schallereignisses | |
DE60036958T2 (de) | Verfahren und vorrichtung zur ausrichtung von schall mit einer gruppe von emissionswandlern | |
DE102014217344A1 (de) | Lautsprechersystem | |
WO2015004526A2 (de) | Variable vorrichtung zum ausrichten von schallwellenfronten | |
EP3061271B1 (de) | Wellenfeldsynthese-system | |
DE10355146A1 (de) | Vorrichtung und Verfahren zum Erzeugen eines Tieftonkanals | |
DE102005001395B4 (de) | Verfahren und Vorrichtung zur Transformation des frühen Schallfeldes | |
DE102016124084B4 (de) | Lautsprechersystem mit Richtwirkung | |
EP2754151B1 (de) | Vorrichtung, verfahren und elektroakustisches system zur nachhallzeitverlängerung | |
DE202014009095U1 (de) | Lautsprecherbox mit veränderlicher Richtwirkung für die mittleren- und hohen Frequenzen | |
WO2020249675A1 (de) | Vorrichtung und verfahren zur beschallung eines räumlichen bereichs | |
DE102012103607A1 (de) | Anordnung zur Verringerung des durch eine Schallquelle verursachten Geräuschs und Verfahren zur Verringerung des Geräuschs | |
WO2023280982A1 (de) | Verfahren und vorrichtung zur beschallung mindestens eines publikumsbereiches | |
DE19639159C2 (de) | Lautsprecherbox | |
DE112017000382T5 (de) | Schallstrahlungsmustersteuerung | |
EP0025118A1 (de) | Anordnung zur akustischen Wiedergabe von Signalen, die mittels eines rechten und eines linken Stereo-Kanals darstellbar sind | |
WO2015022578A1 (de) | Zweidimensionale anordnung von schallwandlern für eventbeschallungen | |
DE945768C (de) | Aus mehreren in einer Reihe in eine gemeinsame lattenartige Schallwand eingebauten Lautsprechern bestehende Lautsprecher-Gruppenanordnung | |
DE102018108852B3 (de) | Verfahren zur Beeinflussung einer auditiven Richtungswahrnehmung eines Hörers | |
DE102022129642A1 (de) | Verfahren zur richtungsabhängigen Korrektur des Frequenzganges von Schallwellenfronten | |
DE102020203659A1 (de) | Schallwandler-Anordnung und Verfahren zum Betrieb einer Schallwandler-Anordnung | |
DE19647095C1 (de) | Lautsprecheranordnung | |
EP4140151A1 (de) | Virtuelle lautsprecher für akustisch intransparente bildschirme | |
EP2637417A1 (de) | Gehäuse für Dipollautsprecher, Verfahren zur dessen Herstellung und Dipollautsprecher |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14806713 Country of ref document: EP Kind code of ref document: A2 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14911443 Country of ref document: US Ref document number: 112014003700 Country of ref document: DE Ref document number: 1120140037001 Country of ref document: DE |
|
REEP | Request for entry into the european phase |
Ref document number: 2014806713 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014806713 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: R225 Ref document number: 112014003700 Country of ref document: DE |