US3728497A - Dynamic loudspeaker using wall as diaphragm - Google Patents
Dynamic loudspeaker using wall as diaphragm Download PDFInfo
- Publication number
- US3728497A US3728497A US00157395A US3728497DA US3728497A US 3728497 A US3728497 A US 3728497A US 00157395 A US00157395 A US 00157395A US 3728497D A US3728497D A US 3728497DA US 3728497 A US3728497 A US 3728497A
- Authority
- US
- United States
- Prior art keywords
- transducer
- damper
- hub portion
- dynamic
- pillar
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H04R9/066—Loudspeakers using the principle of inertia
Definitions
- ABSTRACT [30] F reign Application Priority at a A hollow pillar portion is connected to the damper or July 6, 1970 Japan ..45 67265 casing a transducer the transduFer mm a support on board member by a screw whlch passes 52 us. c1. ..179/1s1 w, 179/115.5 R through the hollow P P The Pi"ar 51 1111. C1. ..H04r 9/04 Portion enables both the low and high frequency [58] Field of Search 179/181 w, 115.5 R; h r ri to be n in n enables h r n 310/15, 27 1 ducer to be afiixed to the board member without rotation of the transducer. [56] References Cited 3 Claims, 3 Drawing Figures UNITED STATES PATENTS 3,366,749 l/1968 Ries ..l79/115.5 R
- This invention relates to a dynamic transducer for converting electrical energy into sound energy, and is particularly concerned with an audio transducer which will be mounted on a board member in a room such as a wall or ceiling.
- the damper may be one with suitable stiffness, if the transducer is constructed so as to be screwed into a base plate previously fixed on a wall.
- the transducer shown in U.S. Pat. Ser. No. 3,366,749 is one of this type. But, this type of transducer must be also mounted by rotation.
- Transducers can be mounted without rotation, if a flange plate is provided thereon as a member for mounting.
- this type of transducer has low efficiency especially in the high frequency zone owing to a spring action caused by the path through which vibration is transmitted.
- the wall is one with considerable thickness and stiffness, the above spring action is suppressed. Accordingly, the transducer of the last mentioned type may be used satisfactorily in particular cases where the spring action is suppressed by the nature of the wall or the like.
- the principal object of the present invention is to provide an improved dynamic transducer in which the above explained difficulties are overcome.
- a dynamic transducer characterized in that a hollow pillar portion is connected to the damper of the voice coil, and the hollow pillar portion passes through a hole in the center pole of the magnet of the transducer, the internal diameter of the hole in the magnet through which the hollow pillar portion passes being larger than the external diameter of the hollow pillar portion, and a screw for mounting the transducer on a board member in the room being admitted through and spaced from the hollow pillar portion.
- FIG. 1 is a longitudinally sectioned view of a dynamic transducer according to the present invention
- FIG. 2 is a longitudinally sectioned view of another dynamic transducer according to the present invention.
- FIG. 3 is a longitudinally sectioned view of still another dynamic transducer according to the present invention.
- the transducer shown in FIG. 1 is mounted on a board member I.
- the magnet of this transducer is composed of a yoke 3 and a permanent magnet 4.
- the plate portion and the center pole portion of the magnet are shown by the numerals 3a, 3b respectively.
- the magnet is provided with a hole 30 which passes through the center pole 3b of the magnet.
- the damper of the transducer comprises a boss portion 2a which engages with the board member 1, a supporting portion 2b for a voice coil 5, a spring portion 20 and a portion 2d which engages with the magnet.
- the boss portion 2a is provided with a center hole which a wood screw 6 passes through.
- the portion 2d is engaged with and fixed to the outer peripheral surface of the plate portion 3a of the magnet, thus, determining the position of the voice coil 5 in the air gap of the magnet.
- a case 7 with a central pillar or cylindrical portion 7a is provided for enclosing the above mentioned various parts.
- the pillar portion 7a passes through the hole 3c of the center pole 3b. There is a sufficient space between the center pole 3b and the pillar portion 7a to avoid any mutual contact therebetween.
- the pillar portion 7a is hollow and a wood screw 6 passes freely through this portion 7a and the hole of the boss portion 2a of the damper 2.
- the hollow pillar portion 7a of the case 7 is fixed to the damper 2. In this modification the case 7 does not contact with the magnet and vibrates together the board member 1.
- the transducer is mounted on the board member 1 by the wood screw 6 following a process wherein any turning of the transducer and stresses on the vibrating spring portion 20 of the damper 2 are eliminated.
- the damper 2 can be made as a single unit thus improving the low frequency zone characteristics, and furthermore, the boss portion 2a of the damper 2 having a small area the board member 1 at its front end thus, improving high frequency zone characteristics.
- FIG. 1 The construction shown in FIG. 1 can be modified as shown in FIG. 2.
- the damper 2 is formed as a part of the case 7 and arranged remote from the inner board member 1.
- a member 8 is disposed as a dust cover.
- This member 8 may be modified to one which acts as a damper.
- the transducer becomes a type wherein dampers are disposed on both sides.
- the transducer is mounted on a board member 1 similarly to the transducer shown in FIG. 1.
- the voice coil 5 is arranged remote from the board member 1, but the performance of the transducer is the same as that of the transducer shown in FIG. 1.
- the transducer shown in FIG. 3 is provided with a inner end plate 9 which covers the open end of the case.
- This type of transducer is the same with that shown in FIG. 1 except for the provision of the end plate 9.
- a dynamic transducer comprising a disc shaped damper member having a relatively thick hub portion having a central opening therethrough and a relatively thin outer portion, a voice coil mounted on an axially extending sleeve having one end thereof secured to said damper member, an annular magnetic assembly including an annular permanent magnet and an annular yoke portion providing an axially extending gap into which transmitting the attaching force through said pillar member and said hub portion.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1970067265U JPS5221050Y1 (fr) | 1970-07-06 | 1970-07-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3728497A true US3728497A (en) | 1973-04-17 |
Family
ID=33063557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00157395A Expired - Lifetime US3728497A (en) | 1970-07-06 | 1971-06-28 | Dynamic loudspeaker using wall as diaphragm |
Country Status (2)
Country | Link |
---|---|
US (1) | US3728497A (fr) |
JP (1) | JPS5221050Y1 (fr) |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4354067A (en) * | 1978-05-17 | 1982-10-12 | Bodysonic Kabushiki Kaisha | Audio-band electromechanical vibration converter |
US4392027A (en) * | 1978-05-05 | 1983-07-05 | Messerschmitt-Boelkow-Blohm Gesellschaft Mit Beschraenkter Haftung | Method and apparatus for providing a uniform sound distribution in an aircraft cabin |
US4495638A (en) * | 1978-05-17 | 1985-01-22 | Body Sonic Kabushiki Kaisha | Audio-band electro-mechanical vibration converter |
US4506117A (en) * | 1981-12-22 | 1985-03-19 | Multiphonie S.A. | Electroacoustic transducer |
DE3523973A1 (de) * | 1984-07-10 | 1986-01-23 | Pioneer Electronic Corp., Tokio/Tokyo | Elektro-schwingungswandler |
WO1989000798A1 (fr) * | 1987-07-13 | 1989-01-26 | Avm Hess, Inc. | Transducteur acoustique |
US4926486A (en) * | 1987-07-17 | 1990-05-15 | Barsumian Bruce R | Transducer assembly for automatic message system |
US4951270A (en) * | 1989-06-20 | 1990-08-21 | Andrews Jay E | Audio transducer apparatus |
US5058173A (en) * | 1990-01-05 | 1991-10-15 | Ashworth William J | Combination inertia type audio transducer and loudspeaker |
US5335284A (en) * | 1993-11-23 | 1994-08-02 | Lemons James W | Coneless, no-moving-parts speaker |
US5546469A (en) * | 1994-08-15 | 1996-08-13 | Donahoe; Danny T. | Sound transducer |
US5706358A (en) * | 1996-07-26 | 1998-01-06 | Ashworth; William J. | Magnetic audio transducer with hinged armature |
US5793877A (en) * | 1995-05-19 | 1998-08-11 | Moonstone Technology Limited | Through-window speaker/microphone |
DE19818988A1 (de) * | 1998-04-28 | 1999-11-11 | Siemens Ag | Elektronisches Gerät mit einem elektroakustischen Wandler |
US6151402A (en) * | 1995-09-02 | 2000-11-21 | New Transducers Limited | Vibration transducers |
US6519349B1 (en) | 1995-09-02 | 2003-02-11 | New Transducers Limited | Loudspeaker |
US20030048918A1 (en) * | 2001-09-07 | 2003-03-13 | Dillon Geoffrey M. | Installing a high fidelity sound, voice paging, or music system by mounting an electrical to acoustic transducer inside a wall mounted gang box |
US6751333B1 (en) | 1995-09-02 | 2004-06-15 | New Transducers Limited | Inertial vibration transducers |
US6792126B2 (en) * | 1998-05-15 | 2004-09-14 | Fujitsu Limited | Information processing device and speaker unit applicable thereto |
US6904154B2 (en) | 1995-09-02 | 2005-06-07 | New Transducers Limited | Acoustic device |
US20050184607A1 (en) * | 2004-02-20 | 2005-08-25 | Yuichi Nakajima | Exciter for directly vibrating board |
US20050201571A1 (en) * | 2004-03-12 | 2005-09-15 | Shell Shocked Sound, Inc. | Acoustic bracket system |
US20050207609A1 (en) * | 2004-02-19 | 2005-09-22 | Oser R B | Transducer for tactile applications and apparatus incorporating transducers |
US6965679B1 (en) * | 2000-10-17 | 2005-11-15 | Alejandro Jose Pedro Lopez Bosio | Equalizable electro-acoustic device used in commercial panels and method for converting said panels |
US20060115107A1 (en) * | 2004-11-24 | 2006-06-01 | Vincent Stephen S | Inertial voice type coil actuator |
US20070025575A1 (en) * | 2005-02-18 | 2007-02-01 | So Sound Solutions Llc | System and method for integrating transducers into body support structures |
US7292702B2 (en) | 2003-04-29 | 2007-11-06 | Dimensional Communications, Inc. | In-wall speaker system method and apparatus |
US20080044042A1 (en) * | 2006-08-18 | 2008-02-21 | Wei Jia Liu | Sonic transducer |
US20080085029A1 (en) * | 2003-04-29 | 2008-04-10 | Hagman Paul N | In-wall speaker system method and apparatus |
US20090010468A1 (en) * | 2004-02-19 | 2009-01-08 | Richard Barry Oser | Actuation of floor systems using mechanical and electro-active polymer transducers |
DE202008017352U1 (de) | 2008-07-03 | 2009-07-09 | Preform Gmbh | Adaptive Rauscherzeugungsvorrichtung |
US20100316236A1 (en) * | 2009-06-11 | 2010-12-16 | Snider Darin J | Home Theater |
DE102009048866A1 (de) | 2009-08-27 | 2011-03-03 | Bösnecker, Robert, Dr. | Akustisches Antriebselement mit Mittenloch |
US8358801B2 (en) | 2007-02-12 | 2013-01-22 | Robert Katz | Magnetic circuit for electrodynamic moving voice coil actuators |
WO2015024092A1 (fr) * | 2013-08-21 | 2015-02-26 | Vista Acquisitions Inc. | Systèmes audio de génération de son sur un scooter des mers et sur d'autres véhicules de plaisance |
US20150071459A1 (en) * | 2005-08-03 | 2015-03-12 | The Boeing Company | Flat Panel Loudspeaker System |
US9025798B2 (en) | 2010-06-09 | 2015-05-05 | Stephen Saint Vincent | Multi-coaxial transducers and methods |
US10587949B1 (en) | 2018-03-28 | 2020-03-10 | Paul N. Hagman | Acoustically tuned face panel for speaker system |
US20230056700A1 (en) * | 2021-08-20 | 2023-02-23 | Denso Ten Limited | Panel speaker |
US11666942B2 (en) * | 2016-07-25 | 2023-06-06 | Haptech Holdings, Inc. | Haptic transducer and footplate coupled to the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4960752B2 (ja) * | 2007-04-24 | 2012-06-27 | パナソニック株式会社 | 浴室内装板音出力システム |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3366749A (en) * | 1964-04-09 | 1968-01-30 | Allen Alan A | Audio transducer |
US3609253A (en) * | 1968-05-03 | 1971-09-28 | William J Ashworth | Loudspeaker with improved voice coil suspension |
US3636281A (en) * | 1969-01-13 | 1972-01-18 | Robert T Cozart | Loudspeaker using wall as diaphragm |
-
1970
- 1970-07-06 JP JP1970067265U patent/JPS5221050Y1/ja not_active Expired
-
1971
- 1971-06-28 US US00157395A patent/US3728497A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3366749A (en) * | 1964-04-09 | 1968-01-30 | Allen Alan A | Audio transducer |
US3609253A (en) * | 1968-05-03 | 1971-09-28 | William J Ashworth | Loudspeaker with improved voice coil suspension |
US3636281A (en) * | 1969-01-13 | 1972-01-18 | Robert T Cozart | Loudspeaker using wall as diaphragm |
Cited By (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4392027A (en) * | 1978-05-05 | 1983-07-05 | Messerschmitt-Boelkow-Blohm Gesellschaft Mit Beschraenkter Haftung | Method and apparatus for providing a uniform sound distribution in an aircraft cabin |
US4354067A (en) * | 1978-05-17 | 1982-10-12 | Bodysonic Kabushiki Kaisha | Audio-band electromechanical vibration converter |
US4495638A (en) * | 1978-05-17 | 1985-01-22 | Body Sonic Kabushiki Kaisha | Audio-band electro-mechanical vibration converter |
US4506117A (en) * | 1981-12-22 | 1985-03-19 | Multiphonie S.A. | Electroacoustic transducer |
EP0083310B1 (fr) * | 1981-12-22 | 1987-03-18 | Multiphonie S.A. | Transducteur électro-acoustique |
DE3523973A1 (de) * | 1984-07-10 | 1986-01-23 | Pioneer Electronic Corp., Tokio/Tokyo | Elektro-schwingungswandler |
WO1989000798A1 (fr) * | 1987-07-13 | 1989-01-26 | Avm Hess, Inc. | Transducteur acoustique |
US4914750A (en) * | 1987-07-13 | 1990-04-03 | Avm Hess, Inc. | Sound transducer |
US4926486A (en) * | 1987-07-17 | 1990-05-15 | Barsumian Bruce R | Transducer assembly for automatic message system |
US4951270A (en) * | 1989-06-20 | 1990-08-21 | Andrews Jay E | Audio transducer apparatus |
US5058173A (en) * | 1990-01-05 | 1991-10-15 | Ashworth William J | Combination inertia type audio transducer and loudspeaker |
US5335284A (en) * | 1993-11-23 | 1994-08-02 | Lemons James W | Coneless, no-moving-parts speaker |
US5546469A (en) * | 1994-08-15 | 1996-08-13 | Donahoe; Danny T. | Sound transducer |
US5793877A (en) * | 1995-05-19 | 1998-08-11 | Moonstone Technology Limited | Through-window speaker/microphone |
US7158647B2 (en) | 1995-09-02 | 2007-01-02 | New Transducers Limited | Acoustic device |
US6151402A (en) * | 1995-09-02 | 2000-11-21 | New Transducers Limited | Vibration transducers |
US6519349B1 (en) | 1995-09-02 | 2003-02-11 | New Transducers Limited | Loudspeaker |
US20060159293A1 (en) * | 1995-09-02 | 2006-07-20 | New Transducers Limited | Acoustic device |
US6751333B1 (en) | 1995-09-02 | 2004-06-15 | New Transducers Limited | Inertial vibration transducers |
US6904154B2 (en) | 1995-09-02 | 2005-06-07 | New Transducers Limited | Acoustic device |
US20050147273A1 (en) * | 1995-09-02 | 2005-07-07 | New Transducers Limited | Acoustic device |
US7194098B2 (en) | 1995-09-02 | 2007-03-20 | New Transducers Limited | Acoustic device |
US5706358A (en) * | 1996-07-26 | 1998-01-06 | Ashworth; William J. | Magnetic audio transducer with hinged armature |
DE19818988A1 (de) * | 1998-04-28 | 1999-11-11 | Siemens Ag | Elektronisches Gerät mit einem elektroakustischen Wandler |
US6792126B2 (en) * | 1998-05-15 | 2004-09-14 | Fujitsu Limited | Information processing device and speaker unit applicable thereto |
US6965679B1 (en) * | 2000-10-17 | 2005-11-15 | Alejandro Jose Pedro Lopez Bosio | Equalizable electro-acoustic device used in commercial panels and method for converting said panels |
US20030048918A1 (en) * | 2001-09-07 | 2003-03-13 | Dillon Geoffrey M. | Installing a high fidelity sound, voice paging, or music system by mounting an electrical to acoustic transducer inside a wall mounted gang box |
US7292702B2 (en) | 2003-04-29 | 2007-11-06 | Dimensional Communications, Inc. | In-wall speaker system method and apparatus |
US20080085029A1 (en) * | 2003-04-29 | 2008-04-10 | Hagman Paul N | In-wall speaker system method and apparatus |
US7418108B2 (en) | 2004-02-19 | 2008-08-26 | So Sound Solutions, Llc | Transducer for tactile applications and apparatus incorporating transducers |
US8761417B2 (en) | 2004-02-19 | 2014-06-24 | So Sound Solutions, Llc | Tactile stimulation using musical tonal frequencies |
US8077884B2 (en) | 2004-02-19 | 2011-12-13 | So Sound Solutions, Llc | Actuation of floor systems using mechanical and electro-active polymer transducers |
US20090010468A1 (en) * | 2004-02-19 | 2009-01-08 | Richard Barry Oser | Actuation of floor systems using mechanical and electro-active polymer transducers |
US20050207609A1 (en) * | 2004-02-19 | 2005-09-22 | Oser R B | Transducer for tactile applications and apparatus incorporating transducers |
US20050184607A1 (en) * | 2004-02-20 | 2005-08-25 | Yuichi Nakajima | Exciter for directly vibrating board |
US7030522B2 (en) * | 2004-02-20 | 2006-04-18 | Fujitsu Ten Limited | Exciter for directly vibrating board |
US7636447B2 (en) * | 2004-03-12 | 2009-12-22 | Multi Service Corporation | Acoustic bracket system |
US20050201571A1 (en) * | 2004-03-12 | 2005-09-15 | Shell Shocked Sound, Inc. | Acoustic bracket system |
US7386144B2 (en) | 2004-11-24 | 2008-06-10 | Revolution Acoustics, Ltd. | Inertial voice type coil actuator |
US20060115107A1 (en) * | 2004-11-24 | 2006-06-01 | Vincent Stephen S | Inertial voice type coil actuator |
US7981064B2 (en) | 2005-02-18 | 2011-07-19 | So Sound Solutions, Llc | System and method for integrating transducers into body support structures |
US20070025575A1 (en) * | 2005-02-18 | 2007-02-01 | So Sound Solutions Llc | System and method for integrating transducers into body support structures |
US8617089B2 (en) | 2005-02-18 | 2013-12-31 | So Sound Solutions Llc | Inducing tactile stimulation of musical tonal frequencies |
US10252802B2 (en) * | 2005-08-03 | 2019-04-09 | The Boeing Company | Flat panel loudspeaker system |
US20150071459A1 (en) * | 2005-08-03 | 2015-03-12 | The Boeing Company | Flat Panel Loudspeaker System |
US20080044042A1 (en) * | 2006-08-18 | 2008-02-21 | Wei Jia Liu | Sonic transducer |
US8358801B2 (en) | 2007-02-12 | 2013-01-22 | Robert Katz | Magnetic circuit for electrodynamic moving voice coil actuators |
US20110211721A1 (en) * | 2008-07-03 | 2011-09-01 | Preform Gmbh | Adaptive noise generating device |
US8611576B2 (en) | 2008-07-03 | 2013-12-17 | Preform Gmbh | Adaptive noise generating device |
DE202008017352U1 (de) | 2008-07-03 | 2009-07-09 | Preform Gmbh | Adaptive Rauscherzeugungsvorrichtung |
US8340327B2 (en) * | 2009-06-11 | 2012-12-25 | Magna International Inc. | Home theater |
US20100316236A1 (en) * | 2009-06-11 | 2010-12-16 | Snider Darin J | Home Theater |
DE102009048866A1 (de) | 2009-08-27 | 2011-03-03 | Bösnecker, Robert, Dr. | Akustisches Antriebselement mit Mittenloch |
US9025798B2 (en) | 2010-06-09 | 2015-05-05 | Stephen Saint Vincent | Multi-coaxial transducers and methods |
WO2015024092A1 (fr) * | 2013-08-21 | 2015-02-26 | Vista Acquisitions Inc. | Systèmes audio de génération de son sur un scooter des mers et sur d'autres véhicules de plaisance |
US9774936B2 (en) | 2013-08-21 | 2017-09-26 | Vista Acquisitions Inc. | Audio systems for generating sound on personal watercraft and other recreational vehicles |
US11666942B2 (en) * | 2016-07-25 | 2023-06-06 | Haptech Holdings, Inc. | Haptic transducer and footplate coupled to the same |
US10587949B1 (en) | 2018-03-28 | 2020-03-10 | Paul N. Hagman | Acoustically tuned face panel for speaker system |
US20230056700A1 (en) * | 2021-08-20 | 2023-02-23 | Denso Ten Limited | Panel speaker |
US11743624B2 (en) * | 2021-08-20 | 2023-08-29 | Denso Ten Limited | Panel speaker |
Also Published As
Publication number | Publication date |
---|---|
DE2132018B2 (de) | 1972-11-02 |
JPS5221050Y1 (fr) | 1977-05-14 |
DE2132018A1 (de) | 1972-01-20 |
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