FR920293A - Microphone - Google Patents

Microphone

Info

Publication number
FR920293A
FR920293A FR920293DA FR920293A FR 920293 A FR920293 A FR 920293A FR 920293D A FR920293D A FR 920293DA FR 920293 A FR920293 A FR 920293A
Authority
FR
France
Prior art keywords
microphone
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
Other languages
English (en)
Inventor
Francis Cheyney Beekley
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 filed Critical
Application granted granted Critical
Publication of FR920293A publication Critical patent/FR920293A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/005—Circuits for transducers for combining the signals of two or more microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
FR920293D 1937-06-04 1946-01-17 Microphone Expired FR920293A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14640537A 1937-06-04 1937-06-04
US308239A US2309109A (en) 1937-06-04 1939-12-08 Microphone

Publications (1)

Publication Number Publication Date
FR920293A true FR920293A (fr) 1947-04-02

Family

ID=32096763

Family Applications (1)

Application Number Title Priority Date Filing Date
FR920293D Expired FR920293A (fr) 1937-06-04 1946-01-17 Microphone

Country Status (3)

Country Link
US (1) US2309109A (fr)
FR (1) FR920293A (fr)
GB (1) GB563595A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417927A (en) * 1943-03-22 1947-03-25 Automatic Elect Lab Sound direction finder
US2495809A (en) * 1945-09-06 1950-01-31 Rca Corp Signal expansion or compression
US2512173A (en) * 1946-10-05 1950-06-20 Gen Controls Co Automatic valve control for fluid supply in burner systems
US2572376A (en) * 1948-05-28 1951-10-23 Rca Corp Velocity type microphone
US2810786A (en) * 1950-06-12 1957-10-22 Siemens Ag Directional microphone system
US2854511A (en) * 1954-05-18 1958-09-30 Rca Corp Directional microphone
AT226290B (de) * 1961-06-19 1963-03-11 Akg Akustische Kino Geraete Schallempfänger mit vorzugsweise einseitiger, gegebenenfalls einstellbarer Richtcharakteristik, enthaltend ein oder mehrere nach dem elektrostatischen Prinzip arbeitende Wandlersysteme
DE3374514D1 (en) * 1982-01-27 1987-12-17 Racal Acoustics Ltd Improvements in and relating to communications systems
GB2147475B (en) * 1983-09-28 1986-12-17 Intech Systems Corp Differential stethoscope
US6438240B1 (en) * 1997-02-18 2002-08-20 Mitel Corporation Circuit to improve transducer separation in handsfree telephone
US7889882B2 (en) * 2006-12-20 2011-02-15 Leonard Marshall Selectable diaphragm condenser microphone

Also Published As

Publication number Publication date
GB563595A (en) 1944-08-22
US2309109A (en) 1943-01-26

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