GB774003A - Improvements in or relating to pressure gradient microphones - Google Patents

Improvements in or relating to pressure gradient microphones

Info

Publication number
GB774003A
GB774003A GB25298/54A GB2529854A GB774003A GB 774003 A GB774003 A GB 774003A GB 25298/54 A GB25298/54 A GB 25298/54A GB 2529854 A GB2529854 A GB 2529854A GB 774003 A GB774003 A GB 774003A
Authority
GB
United Kingdom
Prior art keywords
chamber
microphone
frequency
pressure gradient
passages
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
GB25298/54A
Other languages
English (en)
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.)
Bosch Security Systems Inc
Original Assignee
Electro Voice Inc
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 Electro Voice Inc filed Critical Electro Voice Inc
Publication of GB774003A publication Critical patent/GB774003A/en
Expired legal-status Critical Current

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
    • H04R1/32—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
    • H04R1/38—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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
GB25298/54A 1954-01-11 1954-08-31 Improvements in or relating to pressure gradient microphones Expired GB774003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US403099A US3115207A (en) 1954-01-11 1954-01-11 Unidirectional microphone

Publications (1)

Publication Number Publication Date
GB774003A true GB774003A (en) 1957-05-01

Family

ID=23594464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25298/54A Expired GB774003A (en) 1954-01-11 1954-08-31 Improvements in or relating to pressure gradient microphones

Country Status (3)

Country Link
US (1) US3115207A (ko)
GB (1) GB774003A (ko)
NL (2) NL190970A (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1096420B (de) * 1958-12-24 1961-01-05 Sennheiser Electronic Elektroakustischer Richtwandler
US3095484A (en) * 1959-10-22 1963-06-25 Electro Voice Unidirectional microphone

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378649A (en) * 1964-09-04 1968-04-16 Electro Voice Pressure gradient directional microphone
AT251668B (de) * 1964-10-16 1967-01-10 Akg Akustische Kino Geraete Elektroakusticher Wandler
NL6604150A (ko) * 1966-03-30 1967-10-02
US4410770A (en) * 1981-06-08 1983-10-18 Electro-Voice, Incorporated Directional microphone
ATA74486A (de) * 1986-03-20 1987-04-15 Akg Akustische Kino Geraete Richtmikrophon nach dem elektrostatischen oder elektrodynamischen wandlerprinzip
US5070530A (en) * 1987-04-01 1991-12-03 Grodinsky Robert M Electroacoustic transducers with increased magnetic stability for distortion reduction
US8818009B2 (en) * 2012-10-23 2014-08-26 Shure Acquisition Holdings, Inc. Dual diaphragm dynamic microphone transducer
JP2018148435A (ja) * 2017-03-07 2018-09-20 株式会社オーディオテクニカ 電気音響変換器と電気音響変換器の製造方法と電気音響変換装置
US11134337B2 (en) 2019-11-18 2021-09-28 Bose Corporation Variable port microphone
US11418873B2 (en) 2020-11-03 2022-08-16 Edward J. Simon Surveillance microphone

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2216961A (en) * 1937-09-30 1940-10-08 Rca Corp Sound translating apparatus
US2252846A (en) * 1938-09-30 1941-08-19 Associated Electric Lab Inc Acoustic device
NL72895C (ko) * 1943-01-16
NL67077C (ko) * 1945-12-03
DE1073545B (de) * 1953-06-02 1960-01-21 Akustische u Kino Gerate Ges mbH, Wien Dynamisches Rieht mikrophon

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1096420B (de) * 1958-12-24 1961-01-05 Sennheiser Electronic Elektroakustischer Richtwandler
US3095484A (en) * 1959-10-22 1963-06-25 Electro Voice Unidirectional microphone

Also Published As

Publication number Publication date
US3115207A (en) 1963-12-24
NL102054C (ko)
NL190970A (ko)

Similar Documents

Publication Publication Date Title
GB774003A (en) Improvements in or relating to pressure gradient microphones
GB1426142A (en) Earpiece for earphones
US2252846A (en) Acoustic device
GB1348745A (en) Electroacoustic transducers
GB1363550A (en) Electro-acoustic transducer device
GB969000A (en) Improvements in or relating to electro-acoustical apparatus
ES398583A1 (es) Perfeccionamientos en la construccion de transductores e- lectroacusticos.
GB574611A (en) Improvements in or relating to directional microphones
GB746773A (en) Improvements in electroacoustic devices
US2255250A (en) Voice translating microphone
GB1239188A (ko)
US2699473A (en) Pressure gradient responsive microphone
US2306707A (en) Audiphone
ES422079A1 (es) Perfeccionamiento en los altavoes del tipo de bobina movil.
GB873511A (en) Improvements in or relating to transducers
SU581600A1 (ru) Ленточный громкоговоритель
GB806305A (en) Improvements in transducing devices
GB552328A (en) Improvements in or relating to loud speakers and the like
FR2332671A1 (fr) Enceinte acoustique avec transformateur pneumatique asservi
GB649707A (en) Improvements in or relating to acoustic instruments provided with diaphragms
GB767550A (en) Cabinet type housing for loudspeakers
GB560219A (en) Improvements in moving coil loud-speakers and microphones and like electro-acoustic apparatus
GB497672A (en) Improvements in or relating to microphones and like devices for converting acoustical vibrations into electric oscillations
GB792312A (en) Improvements in and relating to transducers
GB614638A (en) Improvements in and relating to loudspeaking telephone systems