Acoustic insulator for a telephone handset microphone
US5042071A · kind A · utility
15Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1990 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Jan 18, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/03
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus to isolate a microphone from the speaker audio of a telephone handset, preventing feedback howl. The acoustic insulator consists of a single piece of pliable material that has a smaller diameter element (104) that extends through the handset housing. A hollow passage (102) extends the length of the insulator. The microphone (101) is inserted into the insulator in the larger diameter element (103). The insulator is held in the housing by overlapping ridges (105) encircling the outside of the larger element (103).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.