GB849487A - Improvements in or relating to electrostatic sound transducers - Google Patents
Improvements in or relating to electrostatic sound transducersInfo
- Publication number
- GB849487A GB849487A GB8224/57A GB822457A GB849487A GB 849487 A GB849487 A GB 849487A GB 8224/57 A GB8224/57 A GB 8224/57A GB 822457 A GB822457 A GB 822457A GB 849487 A GB849487 A GB 849487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- fixed electrode
- march
- relating
- oxide layer
- 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
- H04R19/00—Electrostatic transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
849,487. Telephone instruments. TELEFUNKEN G.m.b.H. March 13, 1957 [March 14, 1956], No. 8224/57. Class 40 (4). A condenser microphone or loud-speaker comprises an apertured fixed electrode 1 made of aluminium and a vibratable diaphragm 2, the surface of the fixed electrode being chemically or electrochemically oxidized so as to provide a slightly conductive layer 4 which prevents the build-up of surface charges during operation. The diaphragm may be slightly spaced from the fixed electrode, Fig. 1 (not shown), or may be in part contact with a roughened oxidecoated surface as shown in Fig. 2. In a modification of the latter embodiment, Fig. 3, a synthetic resin insulating layer 5 is interposed between the oxide layer and the diaphragm 6. The oxide layer may be formed by application of a solution of soda and potassium chromate in water at a temperature of 90‹ C. and may alternatively be applied to a surface of the -diaphragm. Specification 335,248 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE849487X | 1956-03-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB849487A true GB849487A (en) | 1960-09-28 |
Family
ID=6775869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8224/57A Expired GB849487A (en) | 1956-03-14 | 1957-03-13 | Improvements in or relating to electrostatic sound transducers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB849487A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081626A (en) * | 1976-11-12 | 1978-03-28 | Polaroid Corporation | Electrostatic transducer having narrowed directional characteristic |
-
1957
- 1957-03-13 GB GB8224/57A patent/GB849487A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081626A (en) * | 1976-11-12 | 1978-03-28 | Polaroid Corporation | Electrostatic transducer having narrowed directional characteristic |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5388718A (en) | Sealed head phone | |
GB1032548A (en) | In-the-ear hearing aid | |
GB1504971A (en) | Electrostatic type electroacoustic transducer | |
GB815873A (en) | Underwater transducer | |
GB780178A (en) | Underwater transducer | |
GB849487A (en) | Improvements in or relating to electrostatic sound transducers | |
JPS52111714A (en) | Electrokinetic type electroacoustic transducer with metallic vibr ating plate | |
GB1397662A (en) | Electroacoustic transducers | |
JPS5561197A (en) | Electric-acoustic mutual converter | |
GB1248121A (en) | Diaphragms for loudspeakers | |
JPS5573196A (en) | Speaker | |
JPS5725797A (en) | Piezoelectric electroacoustic transducer | |
JPS5538735A (en) | Electret microphone | |
JPS55121800A (en) | Piezoelectric acoustic converter | |
JPS5342721A (en) | Head phone driver | |
JPS57154999A (en) | Plate speaker | |
JPS54133124A (en) | Piezoelectric type speaker | |
JPS5298504A (en) | Electrostatic capacity type pickup stylus and its production | |
KR930001938Y1 (en) | Condenser microphone cartridge | |
GB801352A (en) | Improvements in or relating to condenser microphone arrangements | |
JPS5421324A (en) | Electrostatic type electro-acoustic transducer | |
JPS56103599A (en) | Composite speaker | |
NL7802691A (en) | Electroacoustic transducer with capacitor and back electrode - has thixotropic lacquer protrusions on flat section functioning with diaphragm | |
JPS5769999A (en) | Piezoelectric type speaker | |
GB1348734A (en) | Elecgro-acoustical transducers |