FR2282766A1 - Capsule microphonique a charbon, protegee contre l'humidite - Google Patents
Capsule microphonique a charbon, protegee contre l'humiditeInfo
- Publication number
- FR2282766A1 FR2282766A1 FR7525412A FR7525412A FR2282766A1 FR 2282766 A1 FR2282766 A1 FR 2282766A1 FR 7525412 A FR7525412 A FR 7525412A FR 7525412 A FR7525412 A FR 7525412A FR 2282766 A1 FR2282766 A1 FR 2282766A1
- Authority
- FR
- France
- Prior art keywords
- charcoal
- protected against
- microphone capsule
- against humidity
- humidity
- 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.)
- Withdrawn
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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
-
- 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
- H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
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 (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742439688 DE2439688C2 (de) | 1974-08-19 | 1974-08-19 | Feuchtigkeitsgeschuetze kohlemikrofonkapsel |
DE19742439720 DE2439720C2 (de) | 1974-08-19 | 1974-08-19 | Feuchtigkeitsgeschuetzte kohlemikrofonkapsel |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2282766A1 true FR2282766A1 (fr) | 1976-03-19 |
Family
ID=25767572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7525412A Withdrawn FR2282766A1 (fr) | 1974-08-19 | 1975-08-14 | Capsule microphonique a charbon, protegee contre l'humidite |
Country Status (9)
Country | Link |
---|---|
AR (1) | AR203525A1 (fr) |
AT (1) | AT338896B (fr) |
BR (1) | BR7505266A (fr) |
CH (1) | CH591197A5 (fr) |
FI (1) | FI752160A (fr) |
FR (1) | FR2282766A1 (fr) |
GB (1) | GB1510870A (fr) |
IT (1) | IT1040482B (fr) |
SE (1) | SE409538B (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108574917B (zh) * | 2018-05-28 | 2021-03-02 | 歌尔股份有限公司 | 电子设备 |
-
1975
- 1975-07-15 GB GB29598/75A patent/GB1510870A/en not_active Expired
- 1975-07-16 AT AT550075A patent/AT338896B/de not_active IP Right Cessation
- 1975-07-24 AR AR259741A patent/AR203525A1/es active
- 1975-07-28 FI FI752160A patent/FI752160A/fi not_active Application Discontinuation
- 1975-08-05 IT IT26110/75A patent/IT1040482B/it active
- 1975-08-14 CH CH1059075A patent/CH591197A5/xx not_active IP Right Cessation
- 1975-08-14 FR FR7525412A patent/FR2282766A1/fr not_active Withdrawn
- 1975-08-18 BR BR7505266*D patent/BR7505266A/pt unknown
- 1975-08-19 SE SE7509277A patent/SE409538B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
CH591197A5 (fr) | 1977-09-15 |
BR7505266A (pt) | 1976-08-03 |
SE7509277L (sv) | 1976-02-20 |
GB1510870A (en) | 1978-05-17 |
SE409538B (sv) | 1979-08-20 |
AR203525A1 (es) | 1975-09-15 |
ATA550075A (de) | 1977-01-15 |
FI752160A (fr) | 1976-02-20 |
IT1040482B (it) | 1979-12-20 |
AT338896B (de) | 1977-09-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |