GB472549A - Improvements in or relating to microphones - Google Patents
Improvements in or relating to microphonesInfo
- Publication number
- GB472549A GB472549A GB8809/36A GB880936A GB472549A GB 472549 A GB472549 A GB 472549A GB 8809/36 A GB8809/36 A GB 8809/36A GB 880936 A GB880936 A GB 880936A GB 472549 A GB472549 A GB 472549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- electrode
- transmitted
- microphone
- perforations
- 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
- H04R19/04—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
472,549. Microphones. BRAUNMUHL, H. J. VON, and WEBER, W. March 24, 1936, No. 8809. Convention date, April 4, 1935. [Class 40 (iv)] A condenser microphone comprises a movable diaphragm or membrane constrained only at its edges and exposed to the sound waves directly or indirectly on both sides by means of a few widely spaced apertures in a fixed plate, the distance between the diaphragm and the fixed plate being so small in relation to the diameter of the perforations and their spacing that the frictional control applied to the diaphragm is high in comparison with the mass and elasticity control over the greater part of the frequency range to be transmitted. As shown, the diaphragm M is mounted between a perforated electrode E and a similar plate P provided with correspondingly arranged apertures. The distance between the diaphragm and the electrode may be approximately one fiftieth of that between the perforations in the electrode. In order to increase the response at low frequencies, a closed chamber L is connected by a tube K with the space adjacent the centre of the diaphragm. The diameter of the microphone is approximately equal to the wave-length of the highest frequency to be transmitted. The perforated plate P may form a second electrode of the microphone and the damped natural frequency of the diaphragm may be approximately equal to that at the middle of the frequency range to be transmitted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE472549X | 1935-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB472549A true GB472549A (en) | 1937-09-24 |
Family
ID=6541442
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8810/36A Expired GB472056A (en) | 1935-04-04 | 1936-03-24 | Improvements in or relating to microphones |
| GB8809/36A Expired GB472549A (en) | 1935-04-04 | 1936-04-24 | Improvements in or relating to microphones |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8810/36A Expired GB472056A (en) | 1935-04-04 | 1936-03-24 | Improvements in or relating to microphones |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2179361A (en) |
| FR (1) | FR804785A (en) |
| GB (2) | GB472056A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2416557A (en) * | 1947-02-25 | Electroacoustic transducer | ||
| US2627558A (en) * | 1946-07-22 | 1953-02-03 | Electro Voice | Unidirectional microphone |
| CH281609A (en) * | 1949-02-22 | 1952-03-15 | Rundfunk Nordwestdeutscher | Method for changing the directional characteristic of a sound receiver consisting of several individual microphones |
| US3770911A (en) * | 1972-07-21 | 1973-11-06 | Industrial Research Prod Inc | Hearing aid system |
| FI20055261A0 (en) | 2005-05-27 | 2005-05-27 | Midas Studios Avoin Yhtioe | An acoustic transducer assembly, system and method for receiving or reproducing acoustic signals |
| FI20055260A0 (en) | 2005-05-27 | 2005-05-27 | Midas Studios Avoin Yhtioe | Apparatus, system and method for receiving or reproducing acoustic signals |
| WO2007024909A1 (en) * | 2005-08-23 | 2007-03-01 | Analog Devices, Inc. | Multi-microphone system |
| US8666090B1 (en) | 2013-02-26 | 2014-03-04 | Full Code Audio LLC | Microphone modeling system and method |
| US10701481B2 (en) | 2018-11-14 | 2020-06-30 | Townsend Labs Inc | Microphone sound isolation baffle and system |
-
1936
- 1936-03-24 GB GB8810/36A patent/GB472056A/en not_active Expired
- 1936-03-26 FR FR804785D patent/FR804785A/en not_active Expired
- 1936-03-30 US US71792A patent/US2179361A/en not_active Expired - Lifetime
- 1936-04-24 GB GB8809/36A patent/GB472549A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB472056A (en) | 1937-09-16 |
| US2179361A (en) | 1939-11-07 |
| FR804785A (en) | 1936-11-02 |
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