Microphone in a speech communicator
US5913178A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Apr 29, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/0214
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a sound guide (5) in a speech communicator, for example a land mobile radio, a walkie talkie, a cordless telephone or a mobile telephone (1). To achieve good sound quality in such a telephone, a cover (3) is often used which reflects the speech in towards the microphone (6) in the body (2) of the telephone. By arranging an air tunnel as a sound guide (5) on the flip-cover and letting it conduct to the body of the telephone and the microphone, the sound quality is improved substantially. In order to avoid uneven frequency response which inevitably occurs in such sound guides due to resonance formation, attenuation material of conventional type is used inside the sound guide together with acoustic extinction by utilizing pressure minimums as a localization point for the microphone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.