Telephone apparatus with hearing assistance
US6754336B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1997 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Apr 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/502
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A telephone apparatus is disclosed which comprises: a receiving portion for receiving a telephone signal and generating a voice signal from the received telephone signal; a frequency conversion portion responsive to a control signal for frequency-converting the voice signal; and a reproducing portion for reproducing the voice signal from the frequency conversion portion. The frequency converting amount may be controlled externally or may be predetermined. The frequency converting amount data may cleared every communication for various circumstances. The circumference noise level and the frequency conversion amount data are stored when the frequency conversion is commended in an automatic mode during a communication. In the later communication, the frequency conversion may be effected automatically when the circumference noise level is larger than the stored circumference noise level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.