FR939127A - Microphones - Google Patents
MicrophonesInfo
- Publication number
- FR939127A FR939127A FR939127DA FR939127A FR 939127 A FR939127 A FR 939127A FR 939127D A FR939127D A FR 939127DA FR 939127 A FR939127 A FR 939127A
- Authority
- FR
- France
- Prior art keywords
- microphones
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/08—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB16408/44A GB611209A (en) | 1944-08-29 | 1944-08-29 | Improvements in or relating to microphones |
Publications (1)
Publication Number | Publication Date |
---|---|
FR939127A true FR939127A (en) | 1948-11-04 |
Family
ID=10076781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR939127D Expired FR939127A (en) | 1944-08-29 | 1946-04-04 | Microphones |
Country Status (3)
Country | Link |
---|---|
US (1) | US2527540A (en) |
FR (1) | FR939127A (en) |
GB (1) | GB611209A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5692060A (en) * | 1995-05-01 | 1997-11-25 | Knowles Electronics, Inc. | Unidirectional microphone |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE396402A (en) * | 1931-03-31 | |||
US2141420A (en) * | 1936-07-28 | 1938-12-27 | Bell Telephone Labor Inc | Acoustic device |
US2093664A (en) * | 1936-07-30 | 1937-09-21 | Bell Telephone Labor Inc | Acoustic device |
US2227580A (en) * | 1938-06-30 | 1941-01-07 | Bell Telephone Labor Inc | Acoustic device |
-
1944
- 1944-08-29 GB GB16408/44A patent/GB611209A/en not_active Expired
-
1945
- 1945-08-18 US US611408A patent/US2527540A/en not_active Expired - Lifetime
-
1946
- 1946-04-04 FR FR939127D patent/FR939127A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2527540A (en) | 1950-10-31 |
GB611209A (en) | 1948-10-27 |
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