Pico-speaker acoustic modulator
US9774959B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2016 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Mar 21, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2217/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A MEMS speaker that may include a membrane positioned in a first plane, wherein the membrane may be configured to oscillate at a first frequency thereby generating an ultrasonic acoustic signal; and an acoustic modulator that may include a blind and a shutter; wherein the blind may be positioned in a second plane; wherein the shutter may be positioned in a third plane; wherein the first plane, the second plane and the third plane may be substantially separated from each other; and wherein the acoustic modulator may be configured to (a) receive or generate a shutter control signal and a blind control signal, and (b) modulate, in response to the shutter control signal and the blind control signal, the ultrasonic acoustic signal such that an audio signal may be generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.