FR1192815A - Improvements in hearing aid devices - Google Patents
Improvements in hearing aid devicesInfo
- Publication number
- FR1192815A FR1192815A FR1192815DA FR1192815A FR 1192815 A FR1192815 A FR 1192815A FR 1192815D A FR1192815D A FR 1192815DA FR 1192815 A FR1192815 A FR 1192815A
- Authority
- FR
- France
- Prior art keywords
- hearing aid
- aid devices
- devices
- hearing
- aid
- 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
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
- H04R25/456—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback mechanically
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
- H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
- H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1192815T | 1958-03-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1192815A true FR1192815A (en) | 1959-10-28 |
Family
ID=9667584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1192815D Expired FR1192815A (en) | 1958-03-11 | 1958-03-11 | Improvements in hearing aid devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1192815A (en) |
-
1958
- 1958-03-11 FR FR1192815D patent/FR1192815A/en not_active Expired
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