GB1273476A - Electrostatic loudspeaker - Google Patents
Electrostatic loudspeakerInfo
- Publication number
- GB1273476A GB1273476A GB21099/70A GB2109970A GB1273476A GB 1273476 A GB1273476 A GB 1273476A GB 21099/70 A GB21099/70 A GB 21099/70A GB 2109970 A GB2109970 A GB 2109970A GB 1273476 A GB1273476 A GB 1273476A
- Authority
- GB
- United Kingdom
- Prior art keywords
- membranes
- backing member
- backing
- spacers
- foam slab
- 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
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
- H04R19/00—Electrostatic transducers
- H04R19/02—Loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
1,273,476. Electrostatic loud-speakers. L. J. BOBB, and C. C. POND. 1 May, 1970 [1 May, 1969], No. 21099/70. Heading H4S. A tensioned membrane 7 (Fig. 4) bearing an electrically conductive coating is spaced from a perforated, electrically conductive, substantially rigid backing member 11 and a foam slab 16, e.g. of polyurethane, bears against at least part of the backing member 11 to impose damping action thereon. The foam slab 16 is preferably acoustically transparent and extends over the whole of the backing member 11. The backing member 11 may be made of a number of perforated plates joined by adhesive tape 14. Fig. 4 shows a push-pull arrangement in which two membranes 7 are sandwiched between two backing members 11. A foam slab 16 bears against each backing member 11. The two membranes 7 are clamped together between frames 5 to form a sub-assembly. Conductive spacers 6 between the membranes 7 serve for electrical connection. Bolted metal strips 17 clamp the foam slabs 16 against the backing members 11 to apply pressure thereto. The backing members 11 are thus mounted on the frame structure independently of the tensioning of the membranes 7 between the frames 5. A pattern of spacers 12, 15 is provided between each backing member 11 and the adjacent membrane 7 whereby the membranes 7 are clamped together where the spacers 12, 15 are provided.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82088869A | 1969-05-01 | 1969-05-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1273476A true GB1273476A (en) | 1972-05-10 |
Family
ID=25231973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21099/70A Expired GB1273476A (en) | 1969-05-01 | 1970-05-01 | Electrostatic loudspeaker |
Country Status (4)
Country | Link |
---|---|
US (1) | US3654403A (en) |
JP (1) | JPS5224405B1 (en) |
DE (1) | DE2021656B2 (en) |
GB (1) | GB1273476A (en) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3892927A (en) * | 1973-09-04 | 1975-07-01 | Theodore Lindenberg | Full range electrostatic loudspeaker for audio frequencies |
SE505752C2 (en) * | 1995-12-22 | 1997-10-06 | Tore Fors | Speaker |
US6188772B1 (en) | 1998-01-07 | 2001-02-13 | American Technology Corporation | Electrostatic speaker with foam stator |
US6304662B1 (en) | 1998-01-07 | 2001-10-16 | American Technology Corporation | Sonic emitter with foam stator |
US20020076069A1 (en) * | 1998-01-07 | 2002-06-20 | American Technology Corporation | Sonic emitter with foam stator |
FI115598B (en) * | 1998-04-27 | 2005-05-31 | Panphonics Oy | Acoustic element |
US6175636B1 (en) | 1998-06-26 | 2001-01-16 | American Technology Corporation | Electrostatic speaker with moveable diaphragm edges |
US6850623B1 (en) | 1999-10-29 | 2005-02-01 | American Technology Corporation | Parametric loudspeaker with improved phase characteristics |
US20050100181A1 (en) * | 1998-09-24 | 2005-05-12 | Particle Measuring Systems, Inc. | Parametric transducer having an emitter film |
US20050195985A1 (en) * | 1999-10-29 | 2005-09-08 | American Technology Corporation | Focused parametric array |
WO2002063922A2 (en) * | 2001-01-22 | 2002-08-15 | American Technology Corporation | Improved single-ended planar-magnetic speaker |
US7627134B2 (en) | 2002-05-02 | 2009-12-01 | Harman International Industries, Incorporated | Magnet retention system in planar loudspeakers |
US7155026B2 (en) | 2002-05-02 | 2006-12-26 | Harman International Industries, Incorporated | Mounting bracket system |
US7035425B2 (en) | 2002-05-02 | 2006-04-25 | Harman International Industries, Incorporated | Frequency response enhancements for electro-dynamic loudspeakers |
US7236608B2 (en) | 2002-05-02 | 2007-06-26 | Harman International Industries, Incorporated | Conductors for electro-dynamic loudspeakers |
US7149321B2 (en) | 2002-05-02 | 2006-12-12 | Harman International Industries, Incorporated | Electro-dynamic loudspeaker mounting system |
US20040042632A1 (en) * | 2002-05-02 | 2004-03-04 | Hutt Steven W. | Directivity control of electro-dynamic loudspeakers |
US7146017B2 (en) * | 2002-05-02 | 2006-12-05 | Harman International Industries, Incorporated | Electrical connectors for electro-dynamic loudspeakers |
US20040022409A1 (en) * | 2002-05-02 | 2004-02-05 | Hutt Steven W. | Film attaching system |
US7152299B2 (en) * | 2002-05-02 | 2006-12-26 | Harman International Industries, Incorporated | Method of assembling a loudspeaker |
US7203332B2 (en) * | 2002-05-02 | 2007-04-10 | Harman International Industries, Incorporated | Magnet arrangement for loudspeaker |
US7278200B2 (en) * | 2002-05-02 | 2007-10-09 | Harman International Industries, Incorporated | Method of tensioning a diaphragm for an electro-dynamic loudspeaker |
US7316290B2 (en) * | 2003-01-30 | 2008-01-08 | Harman International Industries, Incorporated | Acoustic lens system |
CA2528588A1 (en) * | 2003-06-09 | 2005-01-06 | American Technology Corporation | System and method for delivering audio-visual content along a customer waiting line |
WO2005043771A1 (en) * | 2003-10-23 | 2005-05-12 | American Technology Corporation | Method of adusting linear parameters of a parametric ultrasonic signal to reduce non-linearities in decoupled audio output waves and system including same |
US8275137B1 (en) | 2007-03-22 | 2012-09-25 | Parametric Sound Corporation | Audio distortion correction for a parametric reproduction system |
CA2802862A1 (en) | 2010-06-14 | 2011-12-22 | Elwood G. Norris | Improved parametric signal processing and emitter systems and related methods |
WO2013106596A1 (en) | 2012-01-10 | 2013-07-18 | Parametric Sound Corporation | Amplification systems, carrier tracking systems and related methods for use in parametric sound systems |
WO2013158298A1 (en) | 2012-04-18 | 2013-10-24 | Parametric Sound Corporation | Parametric transducers related methods |
US8934650B1 (en) | 2012-07-03 | 2015-01-13 | Turtle Beach Corporation | Low profile parametric transducers and related methods |
US8903104B2 (en) | 2013-04-16 | 2014-12-02 | Turtle Beach Corporation | Video gaming system with ultrasonic speakers |
US9332344B2 (en) | 2013-06-13 | 2016-05-03 | Turtle Beach Corporation | Self-bias emitter circuit |
US8988911B2 (en) | 2013-06-13 | 2015-03-24 | Turtle Beach Corporation | Self-bias emitter circuit |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1816992A (en) * | 1928-05-16 | 1931-08-04 | Vogt Hans | Sounding condenser |
US1776112A (en) * | 1929-04-08 | 1930-09-16 | Ephraim Banning | Loud-speaker condenser |
GB832276A (en) * | 1958-12-02 | 1960-04-06 | Standard Telephones Cables Ltd | Improvements in or relating to electro-acoustic transducers |
US3084229A (en) * | 1960-03-11 | 1963-04-02 | Ampex | Electrostatic earphone |
NL281549A (en) * | 1961-09-25 | |||
US3389226A (en) * | 1964-12-29 | 1968-06-18 | Gen Electric | Electrostatic loudspeaker |
GB1059307A (en) * | 1965-02-12 | 1967-02-15 | Alexander Shackman | Improvements in electrostatic loudspeakers |
US3393764A (en) * | 1966-12-27 | 1968-07-23 | Curtiss R. Schafer | Loudspeaker systems |
US3496307A (en) * | 1967-12-30 | 1970-02-17 | Nippon Musical Instruments Mfg | Loudspeaker |
-
1969
- 1969-05-01 US US820888A patent/US3654403A/en not_active Expired - Lifetime
-
1970
- 1970-04-30 JP JP45036784A patent/JPS5224405B1/ja active Pending
- 1970-05-01 GB GB21099/70A patent/GB1273476A/en not_active Expired
- 1970-05-02 DE DE2021656A patent/DE2021656B2/en active Granted
Also Published As
Publication number | Publication date |
---|---|
US3654403A (en) | 1972-04-04 |
DE2021656C3 (en) | 1979-08-16 |
JPS5224405B1 (en) | 1977-07-01 |
DE2021656A1 (en) | 1970-11-05 |
DE2021656B2 (en) | 1978-12-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |