Wide audio bandwidth transduction method and device
US6631197B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2000 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Apr 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a communication system wherein bone conducted ultrasonic signals are used as carriers to efficiently produce high fidelity, wide audio bandwidth sound. Exemplary embodiments rely on the use of modulation techniques which can achieve high fidelity audible sound, such as carrier plus single sideband (SSB) modulation. Known non-linearities within the ear itself can be exploited to demodulate the modulated ultrasonic carrier without producing audible sounds at the input to the user's ear. The non-linearities of the ear itself, in conjunction with the human brain's perception of audible frequencies generated in response to modulated ultrasonic stimulation, are relied upon to detect audio information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.