Wireless headset
US5982904A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Jan 22, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A wireless headset is provided, comprising: a microphone for receiving a first audio signal and for generating a corresponding microphone electrical signal; a portable receiver/transmitter electrically connected to the microphone for transmitting a first carrier frequency modulated according to the microphone's electrical signal; a remote receiver/transmitter for receiving and demodulating the modulated first carrier frequency to generate a first electrical signal corresponding to the microphone electrical signal, the remote receiver/transmitter also for transmitting a second carrier frequency modulated according to a second electrical signal; the portable receiver/transmitter also for receiving and demodulating the second modulated carrier frequency to generate a speaker electrical signal; and a speaker electrically connected to the portable receiver/transmitter for transforming the speaker's electrical signal into a second audio signal, one of the first and second carrier frequencies being above 900 Megahertz, the other of the first and second carrier frequencies being below 900 Megahertz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.