GB518816A - Improvements in throat microphones - Google Patents
Improvements in throat microphonesInfo
- Publication number
- GB518816A GB518816A GB1669838A GB1669838A GB518816A GB 518816 A GB518816 A GB 518816A GB 1669838 A GB1669838 A GB 1669838A GB 1669838 A GB1669838 A GB 1669838A GB 518816 A GB518816 A GB 518816A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- microphones
- throat
- leather
- rubber
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/46—Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
518,816. Throat microphones. BALLANTINE, S. June 3, 1938, No. 16698. [Class 40(iv)] A throat microphone utilizes the piezoelectric effect, two microphones being preferably carried by a band adapted to be worn round the neck. The wall 1 enclosing the two microphones is of glove leather &c., and may be covered with thin rubber or leather 4 passing over buttons 5 which convey the throat vibrations to the crystal units 7. The units 7 are mounted between members 8, 9 of rubber, leather, or synthetic resin. The buttons 5 of balsa wood or white pine are cemented to the crystal and are secured to metal stirrups 10 which embrace the crystal unit. Metallic inserts 16 pass through the wall 1 and serve to earth the wearer. The frequency characteristic of the microphone at the higher frequencies is improved by making the casing 11 robust, and dimensioning and clamping the crystals so that they have a high natural frequency. Damping of the crystals may be effected by the members 8, 9 or by inserting pieces of damping material, such as oiled felt or rubber, between the crystal and its housing, Fig. 13 (not shown). A stop 7<SP>1</SP>, Fig. 6, prevents excessive bending of the crystal. Connections to the crystal unit are made through a cable having a central conductor and concentric sheath. Specifications 518,814 and 518,815 are referred to.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6246A US2121779A (en) | 1935-02-12 | 1935-02-12 | Sound translating apparatus |
| US166667A US2165124A (en) | 1935-02-12 | 1937-09-30 | Throat microphone |
| GB1669838A GB518816A (en) | 1938-06-03 | 1938-06-03 | Improvements in throat microphones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1669838A GB518816A (en) | 1938-06-03 | 1938-06-03 | Improvements in throat microphones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB518816A true GB518816A (en) | 1940-03-08 |
Family
ID=10082019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1669838A Expired GB518816A (en) | 1935-02-12 | 1938-06-03 | Improvements in throat microphones |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB518816A (en) |
-
1938
- 1938-06-03 GB GB1669838A patent/GB518816A/en not_active Expired
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