WO1991001074A1 - Loudspeaker enclosure - Google Patents

Loudspeaker enclosure Download PDF

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Publication number
WO1991001074A1
WO1991001074A1 PCT/EP1990/001123 EP9001123W WO9101074A1 WO 1991001074 A1 WO1991001074 A1 WO 1991001074A1 EP 9001123 W EP9001123 W EP 9001123W WO 9101074 A1 WO9101074 A1 WO 9101074A1
Authority
WO
WIPO (PCT)
Prior art keywords
loudspeaker
frequency
box
low
mid
Prior art date
Application number
PCT/EP1990/001123
Other languages
German (de)
French (fr)
Inventor
Werner Kranefeld
Original Assignee
Stark, Henric
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 Stark, Henric filed Critical Stark, Henric
Priority to EP90910119A priority Critical patent/EP0482030B1/en
Priority to DE59007284T priority patent/DE59007284D1/en
Publication of WO1991001074A1 publication Critical patent/WO1991001074A1/en

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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • 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
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers

Definitions

  • the invention relates to a loudspeaker box.
  • Loudspeakers usually consist of an often regularly, sometimes irregularly shaped housing, on or on which two, three or even more loudspeakers are generally arranged. Examples are disclosed in DE-GM 81 06 248, DE-OS 2328813, 2433916, DE-GM 85 11 970, DE-OS 27 01 080, DE-OS 24 26666, DE-GM 8529497.
  • the housing must have certain minimum dimensions in order on the one hand to act as a resonance body and on the other hand to ensure that the sound is emitted as uniformly as possible on all sides.
  • reflectors or "acoustic lenses" are occasionally provided.
  • the function of the well-known loudspeakers can be seen from the outside, and they can only be called decorative furnishings in very rare cases.
  • the object of the invention is to create a loudspeaker box which, due to its all-round uniform radiation behavior, is both independent of its installation location and independent of the installation method, ie orientation, but still surpasses the sound pattern of conventional loudspeaker boxes.
  • Another aspect of the invention is to design this loudspeaker box so that its function as a loudspeaker box cannot be seen in order to create a decorative, for example lamp-like piece of furniture in which optimal protection of the technology, in particular of the sensitive loudspeaker itself, is ensured is.
  • the preferably truncated pyramid-shaped housing does not reveal from the outside that it is a loudspeaker box, especially not if the loudspeaker systems are mounted inside the housing, i.e. are not screwed onto or onto a baffle, as is customary with other loudspeakers, and the housing walls are additionally e.g. consist of translucent plastic, behind which, inside the housing, a light source is preferably arranged.
  • the loudspeaker box stands on the strut-like integrated box feet described in detail below. This ensures optimal acoustic decoupling of the speaker from its base.
  • Fig. 1 shows the box in side view
  • Fig. 2 shows a side view of the arrangement of the woofer
  • Fig. 3 shows a partial section along line 3-3 in Fig. 1
  • Fig. 4 shows the structure of a box foot.
  • each carrier is glued or potted with the abutting edges of the walls 10, and a transparent plastic profile inserted into the millings of the walls connects the two walls in a form-fitting manner.
  • the cavity between the profile 14, the walls 10 and the support 12 is potted with transparent material, so that an acoustically optimal, yet stable construction is realized.
  • a tweeter loudspeaker 20 is fastened to a frame 18 and a mid-range loudspeaker 22 underneath it; underneath both there is an insulating layer 24 made of wadding or the like.
  • the carriers 12 extend beyond the edges 16 and carry a spherical-shell-shaped reflector 28, which ensures that the sound waves emitted by the loudspeakers 20 and 22 are deflected and uniformly distributed all around. With this principle, the optimum loudspeaker tuning is achieved by actively controlling the loudspeakers 20 and 22.
  • a triangular base plate 32 is inserted just above the lower horizontal edge 30 of the walls and carries a low-frequency loudspeaker above a central, round cutout 34, which radiates downwards.
  • a triangular hard foam plate 38 elastically bonded flush with the inside edges of the housing; for example with a foam surround; which, when installed, serves as a passive membrane and increases the membrane area by a considerable amount. It can be seen that, owing to the completely centrally symmetrical structure, a correspondingly completely uniform radiation characteristic must result.
  • a light source for example a UV light tube, is preferably arranged between the upper and lower loudspeaker groups, and the base plate can serve as a support. Since such light sources are known per se, the illustration has been omitted in the drawing. However, it is worth mentioning that the color of the loudspeaker box can be changed as desired with little effort, for example by inserting differently colored, fluorescent rods.
  • a crossover is also housed on the base plate, which contains and controls the output stages for the active high-mid-range unit and supplies the low-frequency system directly with the audio signal.
  • the carriers 12 are tubular and closed at the upper end.
  • Round plastic rods 42 are inserted into these carriers, which are supported at the upper end on a spiral spring 44 which is fastened to the frequent, closed end of the carrier.
  • the speaker is suspended freely and is acoustically decoupled from the base.
  • a foam block or another spring element can also be used instead of the screw spring.

Abstract

Loudspeaker enclosure in the form of a preferably three-sided sprung pyramid narrowing towards the top, inside which a downwardly-directed woofer and an upwardly-directed tweeter are arranged to be invisible from the outside.

Description

Lautsprecherbox Speaker box
Die Erfindung betrifft eine Lautsprecherbox. Lautsprecherboxen bestehen üblicherweise aus einem oft regelmäßig, manchmal unregelmäßig geformten Gehäuse, an bzw. auf dem im allgemeinen zwei, drei oder auch mehr Laut¬ sprecher angeordnet sind. Beispiele sind offenbart in DE-GM 81 06 248, DE-OS 2328813, 2433916, DE-GM 85 11 970, DE-OS 27 01 080, DE-OS 24 26666, DE-GM 8529497.The invention relates to a loudspeaker box. Loudspeakers usually consist of an often regularly, sometimes irregularly shaped housing, on or on which two, three or even more loudspeakers are generally arranged. Examples are disclosed in DE-GM 81 06 248, DE-OS 2328813, 2433916, DE-GM 85 11 970, DE-OS 27 01 080, DE-OS 24 26666, DE-GM 8529497.
Das Gehäuse muß gewisse Mindestabmessungen haben, um -einerseits als Re¬ sonanzkörper zu wirken, andererseits eine möglichst allseitig gleich¬ förmige Abstrahlung des Schalls zu gewährleisten. Dafür werden gele¬ gentlich Reflektoren oder "akustische Linsen" vorgesehen.The housing must have certain minimum dimensions in order on the one hand to act as a resonance body and on the other hand to ensure that the sound is emitted as uniformly as possible on all sides. For this purpose, reflectors or "acoustic lenses" are occasionally provided.
Den bekannten Lautsprechern sieht man ihre Funktion äußerlich an, als dekorative Einrichtungsgegenstände sind sie nur in den seltensten Fällen zu bezeichnen.The function of the well-known loudspeakers can be seen from the outside, and they can only be called decorative furnishings in very rare cases.
Aufgabe der Erfindung ist es, eine Lautsprecherbox zu schaffen, die durch ihr rundherum gleichförmiges Abstrahlverhalten sowohl unabhängig von ihrem Aufstellungsort als auch unabhängig von der Aufstellungsweise, d.h. Ausrichtung, ist, dabei aber das Klangbild herkömmlicher Lautspre¬ cherboxen noch übertrifft. Ein weiterer Aspejt der Erfindung ist es, diese Lautsprecherbox so zu gestalten, daß man ihr ihre Funktion als Lautsprecherbox nicht ansieht, um so ein dekoratives, z.B. lampenähnliches Möbelstück zu schaffen, bei dem ein optimaler Schutz der Technik, insbesondere der empfindlichen Lautsprecher selbst, gewährleistet ist.The object of the invention is to create a loudspeaker box which, due to its all-round uniform radiation behavior, is both independent of its installation location and independent of the installation method, ie orientation, but still surpasses the sound pattern of conventional loudspeaker boxes. Another aspect of the invention is to design this loudspeaker box so that its function as a loudspeaker box cannot be seen in order to create a decorative, for example lamp-like piece of furniture in which optimal protection of the technology, in particular of the sensitive loudspeaker itself, is ensured is.
Die Erfindung ist in den unabhängigen Ansprüchen definiert; die Unter¬ ansprüche definieren zweckmäßige Weiterbildungen der Erfindung.The invention is defined in the independent claims; the sub-claims define expedient developments of the invention.
Das vorzugsweise pyramidenstumpfförmige Gehäuse läßt von außen nicht erkennen, daß es sich um eine Lautsprecherbox handelt, insbesondere dann nicht, wenn die Lautsprechersysteme im Gehäuseinneren montiert sind, d.h. nicht auf oder an eine Schallwand aufgeschraubt werden, wie es bei anderen Lautsprecherboxen üblich ist, und die Gehäusewandungen zusätz¬ lich z.B. aus lichtdurchlässigem Kunststoff bestehen, hinter dem, im Gehäuseinneren, vorzugsweise eine Lichtquelle angeordnet ist. die Laut¬ sprecherbox steht^auf nachstehend ausführlich beschriebenen, federbein¬ artigen, integrierten Boxenfüßen. Dadurch wird eine optimale akustische Entkopplung des Lautsprechers von seiner Standfläche erreicht.The preferably truncated pyramid-shaped housing does not reveal from the outside that it is a loudspeaker box, especially not if the loudspeaker systems are mounted inside the housing, i.e. are not screwed onto or onto a baffle, as is customary with other loudspeakers, and the housing walls are additionally e.g. consist of translucent plastic, behind which, inside the housing, a light source is preferably arranged. the loudspeaker box stands on the strut-like integrated box feet described in detail below. This ensures optimal acoustic decoupling of the speaker from its base.
Ein bevorzugtes Ausführungsbeispiel der Lautsprecherbox nach der Erfin¬ dung ist in den beigefügten Zeichnungen weitgehend schematisch darge¬ stellt und wird nachstehend im einzelnen beschrieben.A preferred embodiment of the loudspeaker box according to the invention is shown largely schematically in the accompanying drawings and is described in detail below.
Fig. 1 zeigt die Box in Seitenansicht; Fig. 2 zeigt in Seitenansicht die Anordnung des Tiefton- Lautsprechers; Fig. 3 zeigt einen Teilschnitt nach Linie 3-3 in Fig. 1; Fig.4 zeigt den Aufbau eines Boxenfußes.Fig. 1 shows the box in side view; Fig. 2 shows a side view of the arrangement of the woofer; Fig. 3 shows a partial section along line 3-3 in Fig. 1; Fig. 4 shows the structure of a box foot.
Man erkennt in ig. 1 das -Boxengehäuse in Form eines dreiseitigen, reg¬ elmäßigen Pyramidenstumpfes mit Wandungen 10 aus lichtdurchlässigem Kunststoff. In den Eckbereichen, wo jeweils zwei Wandungen aneinander- grenzen, ist jeweils ein rohrförmiger Träger 12 vorgesehen, ebenfalls aus lichtdurchlässigem oder transparentem Material. Wie Fig. 3 erkennen läßt, ist jeder Träger mit den anstoßenden Kanten der Wandungen 10 ver¬ klebt bzw. vergossen, und ein in die Fräsungen der Wandungen eingescho¬ benes, transparentes Kunststoffprofil verbindet die beiden Wandungen formschlüssig. Der Hohlraum zwischen dem Profil 14, den Wandungen 10 und dem Träger 12 ist mit transparentem Material vergossen, so daß eine akustisch optimale, gleichwohl stabile Konstruktion realisiert wird.You can see in ig. 1 the box housing in the form of a three-sided, regular truncated pyramid with walls 10 made of translucent plastic. In the corner areas, where two walls adjoin each other, a tubular support 12 is provided, also made of translucent or transparent material. As can be seen in FIG. 3 leaves, each carrier is glued or potted with the abutting edges of the walls 10, and a transparent plastic profile inserted into the millings of the walls connects the two walls in a form-fitting manner. The cavity between the profile 14, the walls 10 and the support 12 is potted with transparent material, so that an acoustically optimal, yet stable construction is realized.
Dicht unter der oberen horizontalen Endkante 16 der Wandungen 10 ist, im Gehäuseinneren, auf einem Rahmen 18 ein Hochton-Lautsprecher 20 und un¬ ter ihm ein Mittelton-Lautsprecher 22 befestigt; unter beiden befindet sich eine Dämmschicht 24 aus Polsterwatte oder dergleichen.Just below the upper horizontal end edge 16 of the walls 10, in the interior of the housing, a tweeter loudspeaker 20 is fastened to a frame 18 and a mid-range loudspeaker 22 underneath it; underneath both there is an insulating layer 24 made of wadding or the like.
Die Träger 12 reichen über die Kanten 16 hinaus und tragen einen kugel- schalenförmigen Reflektor 28, der dafür sorgt, daß die von den Laut¬ sprechern 20 und 22 abgestrahlten Schallwellen umgelenkt und ringsum gleichförmig verteilt werden. Die optimale Lautsprecherabstimmung ge¬ lingt bei diesem Prinzip durch aktive Ansteuerung der Lautsprecher 20 und 22.The carriers 12 extend beyond the edges 16 and carry a spherical-shell-shaped reflector 28, which ensures that the sound waves emitted by the loudspeakers 20 and 22 are deflected and uniformly distributed all around. With this principle, the optimum loudspeaker tuning is achieved by actively controlling the loudspeakers 20 and 22.
Dicht oberhalb der unteren horizontalen Kante 30 der Wandungen ist eine dreieckige Bodenplatte 32 eingefügt, die über einem mittigen, runden Ausschnitt 34 einen Tiefton-Lautsprecher trägt, welcher nach unten hin abstrahlt. Unter ihm ist, bündig mit den Gehäuseinnenkanten eine dreieckige Hartschaumplatte 38 elastisch verklebt; beispielsweise mit einer Schaumstoffsicke; die, so angebracht, als Passivmembrane dient und die Membranfläche um einen erheblichen Teil vergrößert. Man erkennt, daß aufgrund des völlig zentralsymmetrischen Aufbaus eine entsprechend völ¬ lig gleichförmige Abstrahlcharakteristik resultieren muß.A triangular base plate 32 is inserted just above the lower horizontal edge 30 of the walls and carries a low-frequency loudspeaker above a central, round cutout 34, which radiates downwards. Below it is a triangular hard foam plate 38 elastically bonded flush with the inside edges of the housing; for example with a foam surround; which, when installed, serves as a passive membrane and increases the membrane area by a considerable amount. It can be seen that, owing to the completely centrally symmetrical structure, a correspondingly completely uniform radiation characteristic must result.
Es ist, bevorzugt zwischen der oberen und der unteren Lautsprechergrup¬ pe, eine Lichtquelle angeordnet, beispielsweise eine UV-Lichtröhre, wo¬ bei die Bodenplatte als Abstützung dienen kann. Da solche Lichtquellen an sich bekannt sind, wurde in der Zeichnung auf die Darstellung ver¬ zichtet. Es ist allerdings erwähnenswert, daß auf diese Weise die Farbe der Lautsprecherbox mit geringem Aufwand, beispielsweise durch Ein¬ schieben verschiedenfarbig bunter, fluoreszierender Stäbe, beliebig verändert werden kann. Auf der Bodenplatte ist ferner eine Frequenzweiche untergebracht, die die Endstufen für die aktive Hoch-Mitteltoneiπheit enthält und ansteuert und das Tieftonsystem unmittelbar mit dem Audiosignal versorgt.A light source, for example a UV light tube, is preferably arranged between the upper and lower loudspeaker groups, and the base plate can serve as a support. Since such light sources are known per se, the illustration has been omitted in the drawing. However, it is worth mentioning that the color of the loudspeaker box can be changed as desired with little effort, for example by inserting differently colored, fluorescent rods. A crossover is also housed on the base plate, which contains and controls the output stages for the active high-mid-range unit and supplies the low-frequency system directly with the audio signal.
Wie in Fig. 4 ersichtlich, sind die Träger 12 rohrförmig und am oberen Ende geschlossen. In diese Träger werden runde Kunststoffstäbe 42 ein¬ geschoben, die sich am oberen Ende auf einer Spiralfeder 44 abstützen, die am öfteren, geschlossenen Ende des Trägers befestigt ist. Durch die richtige Abstimmung der Feder auf das Gewicht des Gehäuses ist die Lautsprecherbox so frei federnd aufgehängt und perfekt akustisch von der Standfläche entkoppelt. Es versteht sich, daß anstelle der Schraubenfe¬ der auch ein Schaumstoffblock oder ein anderes Federelement verwendet werden kann. As can be seen in FIG. 4, the carriers 12 are tubular and closed at the upper end. Round plastic rods 42 are inserted into these carriers, which are supported at the upper end on a spiral spring 44 which is fastened to the frequent, closed end of the carrier. By correctly matching the spring to the weight of the housing, the speaker is suspended freely and is acoustically decoupled from the base. It goes without saying that a foam block or another spring element can also be used instead of the screw spring.

Claims

Patentansprüche Claims
1. Lautsprecherbox in Form eines oben und unten offenen Py.rami- denstumpfes oder Kegels, einem nahe der unteren Öffnung angeordneten, vertikal abwärts abstrahlenden Tiefton-Lautsprecher und mindestens einem nahe der oberen Öffnung angeordneten, vertikal aufwärts abstrahlenden Mittel-/Hochton-Lautsprecher.1. Loudspeaker box in the form of a truncated pyramid or cone, a vertically downward radiating low-frequency loudspeaker arranged near the lower opening and at least one vertically upward radiating mid / high-frequency loudspeaker arranged near the upper opening.
2. Lautsprecherbox nach Anspruch 1 in Form eines dreiseitigen Pyramidenstumpfes.2. Loudspeaker according to claim 1 in the form of a three-sided truncated pyramid.
3. Lautsprecherbox nach Anspruch 1 oder 2 mit mindestens einem Schallreflektor zum Umlenken der von den Lautsprechern erzeugten Schallwellen.3. Loudspeaker according to claim 1 or 2 with at least one sound reflector for deflecting the sound waves generated by the speakers.
4. Lautsprecherbox nach Anspruch 3 mit einem oberhalb des Mit¬ tel-/Hochton-Lautsprechers angeordneten kugel- oder kugelschalenförmigen Reflektor.4. A loudspeaker box according to claim 3 with a spherical or spherical shell-shaped reflector arranged above the central / high-frequency loudspeaker.
5. Lautsprecherbox nach Anspruch 3 oder 4 mit einer unterhalb des senkrecht nach unten abstrahlenden Tiefton-Lautsprechers horizontal an¬ geordneten, auf Lautsprechersystem und Gehäuseboden abgestimmten Pas- sivmembran.5. Loudspeaker according to claim 3 or 4 with a horizontally arranged below the vertically downward radiating low-frequency loudspeaker, matched to the loudspeaker system and housing base, passive membrane.
6. Lautsprecherbox, insbesondere nach einem der vorangehenden Ansprüche, mit Wandungen aus lichtdurchlässigem Kunststoff oder anderem lichtdurchlässigem Material.6. Loudspeaker, in particular according to one of the preceding claims, with walls made of translucent plastic or other translucent material.
7. Lautsprecherbox nach Anspruch 6 mit einer in ihrem Innenraum angeordneten Lichtquelle, insbesondere einer UV-Lichtquelle.7. Loudspeaker according to claim 6 with a light source arranged in its interior, in particular a UV light source.
8. Lautsprecherbox, insbesondere nach einem der vorangehenden Ansprüche, mit Federbeinen. 8. Loudspeaker, in particular according to one of the preceding claims, with struts.
9. Lautsprecherbox, insbesondere nach einem der vorangehenden Ansprüche, mit Audiosignal-Eingängen, die unmittelbar mit einem Tief¬ ton-Lautsprecher verbunden sind sowie über eine Reihenschaltung aus Frequenzweiche und vorzugsweise verstärkungseinstellbaren Zusatzver¬ stärkern mit einem Mittelton- und einem Hochton-Lautsprecher. 9. Loudspeaker box, in particular according to one of the preceding claims, with audio signal inputs which are connected directly to a low-frequency loudspeaker and via a series connection of crossover and preferably gain-adjustable additional amplifiers with a mid-range and a high-range loudspeaker.
PCT/EP1990/001123 1989-07-13 1990-07-10 Loudspeaker enclosure WO1991001074A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP90910119A EP0482030B1 (en) 1989-07-13 1990-07-10 Loudspeaker enclosure
DE59007284T DE59007284D1 (en) 1989-07-13 1990-07-10 SPEAKER BOX.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3923126A DE3923126A1 (en) 1989-07-13 1989-07-13 SPEAKER BOX
DEP3923126.7 1989-07-13

Publications (1)

Publication Number Publication Date
WO1991001074A1 true WO1991001074A1 (en) 1991-01-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/001123 WO1991001074A1 (en) 1989-07-13 1990-07-10 Loudspeaker enclosure

Country Status (4)

Country Link
EP (1) EP0482030B1 (en)
AT (1) ATE112125T1 (en)
DE (2) DE3923126A1 (en)
WO (1) WO1991001074A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2687268A1 (en) * 1992-02-06 1993-08-13 Colin Olivier Omnidirectional acoustic enclosure and method of manufacture
US5895833A (en) * 1993-01-28 1999-04-20 Cohesion Technologies, Inc. Production of human recombinant collagen in the milk of transgenic animals
WO2009061818A1 (en) 2007-11-05 2009-05-14 Medimmune, Llc Methods of treating scleroderma
WO2011042019A1 (en) * 2009-10-07 2011-04-14 Sl Audio A/S Dipole loudspeaker with diffuse rear radiation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29705406U1 (en) * 1997-03-25 1997-06-12 Buenzow Hans Dieter Dipl Ing F Housing for a loudspeaker

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500953A (en) * 1968-12-04 1970-03-17 Uolevi L Lahti Loudspeaker system
DE2441950A1 (en) * 1974-09-02 1976-04-22 Karl Otto Poensgen Loudspeaker box made of transparent plastics - is designed to appear smaller, and it may be coloured on the inside
WO1985001176A1 (en) * 1983-09-06 1985-03-14 Henry Oliver Wolcott Loudspeaker structure
DE3721886A1 (en) * 1987-07-02 1989-01-12 Kellco Keller & Pfahls Gmbh Loudspeaker enclosure
EP0340435A2 (en) * 1988-04-01 1989-11-08 Yamaha Corporation Acoustic apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500953A (en) * 1968-12-04 1970-03-17 Uolevi L Lahti Loudspeaker system
DE2441950A1 (en) * 1974-09-02 1976-04-22 Karl Otto Poensgen Loudspeaker box made of transparent plastics - is designed to appear smaller, and it may be coloured on the inside
WO1985001176A1 (en) * 1983-09-06 1985-03-14 Henry Oliver Wolcott Loudspeaker structure
DE3721886A1 (en) * 1987-07-02 1989-01-12 Kellco Keller & Pfahls Gmbh Loudspeaker enclosure
EP0340435A2 (en) * 1988-04-01 1989-11-08 Yamaha Corporation Acoustic apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Band 11, Nr 110, E496, Zusammenfassung von JP 61-258600, publ 1986-11-15 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2687268A1 (en) * 1992-02-06 1993-08-13 Colin Olivier Omnidirectional acoustic enclosure and method of manufacture
US5895833A (en) * 1993-01-28 1999-04-20 Cohesion Technologies, Inc. Production of human recombinant collagen in the milk of transgenic animals
WO2009061818A1 (en) 2007-11-05 2009-05-14 Medimmune, Llc Methods of treating scleroderma
WO2011042019A1 (en) * 2009-10-07 2011-04-14 Sl Audio A/S Dipole loudspeaker with diffuse rear radiation

Also Published As

Publication number Publication date
DE59007284D1 (en) 1994-10-27
EP0482030B1 (en) 1994-09-21
EP0482030A1 (en) 1992-04-29
DE3923126A1 (en) 1991-01-17
ATE112125T1 (en) 1994-10-15

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