Control of an electrostatic acoustic device
US12348927B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2024 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Feb 14, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Controlling operation of an electrostatic acoustic device including a membrane and an electrode disposed proximate to the membrane. A probe signal varying at radio frequency is injected into the electrode. A current or charge signal is detected by converting the current or charge signal to a modulated voltage signal. The current or charge signal includes an audio signal varying at audio frequencies modulating the radio frequency of the probe signal. The modulated voltage signal is demodulated to produce an audio output signal varying at audio frequency. The audio output signal is transformed to produce an error signal. A control signal is input to the electrostatic acoustic device responsive to the error signal. The control signal is configured to cancel at least in part a mechanical response of the membrane due to ambient noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.