Hearing aid suitable for use under noisy circumstance
US4409435A · kind A · utility
31Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1980 |
| Grant date | Oct 11, 1983 |
| Priority date | — |
| Expiry date | Oct 3, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/356
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hearing aid in which input signals picked up through a microphone are divided to those of two or more frequency bands by means of a frequency division means, signal outputs of frequency band(s) in which noise signals are included are saturated or reduced by a compensating means such as compression or saturation amplifier, and mixed with signals of other signal of frequency band(s) which are not compensated, whereby ambient noises can be removed from voice sounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.