Hearing aid
US4475230A · kind A · utility
13Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1982 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Jul 29, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a hearing aid, when the input sound pressure to the microphone exceeds a preset level for a preset period of time, a control signal is produced to automatically decrease the maximum output sound level, thereby decreasing the overload to the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.