Transducer device for use with communication apparatus
US5909498A · kind A · utility
Inventor
Key dates
| Filing date | Mar 25, 1993 |
| Grant date | Jun 1, 1999 |
| Priority date | — |
| Expiry date | Mar 25, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/107
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A transducer device includes a pair of transducers in the form of a speaker element and a microphone element mounted in a common housing that may be positioned and retained in the external auditory canal of the human ear thereby allowing the user to interface with communications apparatus. The housing is structured to acoustically isolate the microphone and the speaker sufficiently to avoid feedback, i.e., audio coupling. In one embodiment, this isolation is accomplished by a layer of acoustical damping material interposed between the two transducers. In another embodiment, isolation is accomplished by using a separate guide structure for each transducer. In a third embodiment, isolation is accomplished by a ported metallic plate interposed between the two transducers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.