ZA754920B - Improvements in or relating to carbon microphone capsules - Google Patents
Improvements in or relating to carbon microphone capsulesInfo
- Publication number
- ZA754920B ZA754920B ZA00754920A ZA754920A ZA754920B ZA 754920 B ZA754920 B ZA 754920B ZA 00754920 A ZA00754920 A ZA 00754920A ZA 754920 A ZA754920 A ZA 754920A ZA 754920 B ZA754920 B ZA 754920B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- microphone capsules
- carbon microphone
- carbon
- capsules
- Prior art date
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)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742439688 DE2439688C2 (de) | 1974-08-19 | 1974-08-19 | Feuchtigkeitsgeschuetze kohlemikrofonkapsel |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA754920B true ZA754920B (en) | 1976-07-28 |
Family
ID=5923539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA00754920A ZA754920B (en) | 1974-08-19 | 1975-07-30 | Improvements in or relating to carbon microphone capsules |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE832549A (de) |
DE (1) | DE2439688C2 (de) |
ZA (1) | ZA754920B (de) |
-
1974
- 1974-08-19 DE DE19742439688 patent/DE2439688C2/de not_active Expired
-
1975
- 1975-07-30 ZA ZA00754920A patent/ZA754920B/xx unknown
- 1975-08-19 BE BE159302A patent/BE832549A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
BE832549A (fr) | 1976-02-19 |
DE2439688C2 (de) | 1976-09-30 |
DE2439688B1 (de) | 1976-02-12 |
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