GB420390A - Microphone - Google Patents

Microphone

Info

Publication number
GB420390A
GB420390A GB2019333A GB2019333A GB420390A GB 420390 A GB420390 A GB 420390A GB 2019333 A GB2019333 A GB 2019333A GB 2019333 A GB2019333 A GB 2019333A GB 420390 A GB420390 A GB 420390A
Authority
GB
United Kingdom
Prior art keywords
bores
air
membrane
closed
connected
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
Application number
GB2019333A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEORG NEUMANN
Original Assignee
GEORG NEUMANN
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
Priority to DE420390X priority Critical
Application filed by GEORG NEUMANN filed Critical GEORG NEUMANN
Publication of GB420390A publication Critical patent/GB420390A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00Electrostatic transducers
    • H04R19/04Microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00Electrostatic transducers

Abstract

420,390. Microphones. NEUMANN, G., 15, Michaelkirchstrasse, Berlin. July 17, 1933, No. 20193. Convention date, July 16, 1932. [Class 40 (iv)] In a microphone, more particularly a condenser microphone, having a thin, slightly stressed membrane, the restoring force of which is mainly determined by air cushions, the fixed electrode is provided both with closed bores of such a diameter and such a size that the air columns situated therein have a natural frequency above the audible range and also with bores which possess a greater volume than the first mentioned bores or are connected with separate air chambers and favour the lowest frequencies by resonance. The Figure shows a construction of condenser microphone in which a membrane 4 consisting of collodion film coated with beaten gold is pasted on the projecting edge 6 of the fixed electrode 5 in such a manner that the metal coating is not electrically connected with the edge 6. The electrode 5 is provided with closed bores 7 and also with a number of bores 7<1> which communicate with an annular chamber 10 closed by a cover 11, the sealing surface 12 of which is formed with a fine spiral groove which allows air to enter the chamber 10 along a long path but prevents all sound waves from passing to the interior of the chamber. The distances between the bores 7 may be varied and the bores 71 may be individually connected with an increased air space. An insulated contact pin 8 is connected with the membrane at 9.
GB2019333A 1932-07-16 1933-07-17 Microphone Expired GB420390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE420390X 1932-07-16

Publications (1)

Publication Number Publication Date
GB420390A true GB420390A (en) 1934-11-30

Family

ID=6451375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2019333A Expired GB420390A (en) 1932-07-16 1933-07-17 Microphone

Country Status (2)

Country Link
FR (1) FR749076A (en)
GB (1) GB420390A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445821A (en) * 1944-03-29 1948-07-27 Noble E Brewer Condenser microphone
US3007012A (en) * 1958-03-14 1961-10-31 Rca Corp Directional electrostatic microphone
US3031538A (en) * 1957-04-13 1962-04-24 Gorike Rudolf Small-size condenser microphone
US4081626A (en) * 1976-11-12 1978-03-28 Polaroid Corporation Electrostatic transducer having narrowed directional characteristic
GB2142504A (en) * 1983-06-28 1985-01-16 Gibson Dawson Joseph Microphone
GB2456453B (en) * 2006-10-18 2011-02-09 Univ New York State Res Found Miniature non-directional microphone

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924325C (en) * 1952-10-06 1955-02-28 Nordwestdeutscher Rundfunk Ans condenser microphone

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445821A (en) * 1944-03-29 1948-07-27 Noble E Brewer Condenser microphone
US3031538A (en) * 1957-04-13 1962-04-24 Gorike Rudolf Small-size condenser microphone
US3007012A (en) * 1958-03-14 1961-10-31 Rca Corp Directional electrostatic microphone
US4081626A (en) * 1976-11-12 1978-03-28 Polaroid Corporation Electrostatic transducer having narrowed directional characteristic
GB2142504A (en) * 1983-06-28 1985-01-16 Gibson Dawson Joseph Microphone
GB2456453B (en) * 2006-10-18 2011-02-09 Univ New York State Res Found Miniature non-directional microphone

Also Published As

Publication number Publication date
FR749076A (en) 1933-07-18

Similar Documents

Publication Publication Date Title
Yoneyama et al. The audio spotlight: An application of nonlinear interaction of sound waves to a new type of loudspeaker design
US5706252A (en) Wideband multifrequency acoustic transducer
US3995124A (en) Noise cancelling microphone
CA2081038C (en) Electret transducer array and fabrication technique
Heinz et al. On the properties of voiceless fricative consonants
US4064375A (en) Vacuum stressed polymer film piezoelectric transducer
JP4033830B2 (en) microphone
US2439665A (en) Sound reproducing device
KR940003447B1 (en) Undirectional second order gradient microphone
US2138500A (en) Apparatus for the production of music
US2975243A (en) Transducers
US2490466A (en) Loudspeaker diaphragm support comprising plural compliant members
US3118022A (en) Electroacoustic transducer
US4063049A (en) Piezoelectric electroacoustic transducer
US2105010A (en) Piezoelectric device
US8180082B2 (en) Microphone unit, close-talking voice input device, information processing system, and method of manufacturing microphone unit
JPH0965478A (en) Directional microphone synthesis body
US4325456A (en) Acoustical transformer for compression-type loudspeaker with an annular diaphragm
EP0186388B1 (en) Second order toroidal microphone
US2714134A (en) Headset receiver
DK148870B (en) Electroacustic transor
USRE26030E (en) Dynamic transducer
US20100166235A1 (en) Silicon condenser microphone
EP2355541B1 (en) Microphone unit
TWI477159B (en) Vibrating element