US 12,348,927 B2
Control of an electrostatic acoustic device
Gabriel Zeltzer, Lapid (IL); and Meir Shaashua, Tel Aviv (IL)
Assigned to Waves Audio Ltd., Tel Aviv (IL)
Filed by Waves Audio Ltd., Tel Aviv (IL)
Filed on Feb. 14, 2024, as Appl. No. 18/440,981.
Application 18/440,981 is a continuation of application No. 17/925,642, granted, now 11,910,150, previously published as PCT/IL2021/050536, filed on May 11, 2021.
Claims priority of application No. 2007324 (GB), filed on May 18, 2020.
Prior Publication US 2024/0187776 A1, Jun. 6, 2024
Int. Cl. H04R 1/10 (2006.01); G10K 11/178 (2006.01); H04R 3/00 (2006.01); H04R 3/06 (2006.01); H04R 7/04 (2006.01); H04R 7/18 (2006.01); H04R 19/00 (2006.01); H04R 19/02 (2006.01); H04R 29/00 (2006.01)
CPC H04R 1/1041 (2013.01) [G10K 11/17825 (2018.01); G10K 11/17827 (2018.01); H04R 1/1016 (2013.01); H04R 1/1025 (2013.01); H04R 1/1075 (2013.01); H04R 3/06 (2013.01); H04R 7/04 (2013.01); H04R 7/18 (2013.01); H04R 19/00 (2013.01); H04R 19/02 (2013.01); H04R 29/001 (2013.01); G10K 2210/3026 (2013.01); H04R 3/007 (2013.01); H04R 2430/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for controlling operation of an electrostatic acoustic device including a membrane and an electrode disposed proximate to the membrane, wherein the membrane is configured to respond mechanically to a varying electric field emanating from the electrode when a varying audio signal voltage is applied to the electrode, the method comprising:
injecting a probe signal varying at radio frequency into an input of the electrostatic acoustic device;
detecting a current or charge signal by converting the current or charge signal to a modulated voltage signal, wherein the current or charge signal includes an audio signal varying at audio frequencies modulating the radio frequency of the probe signal;
demodulating the modulated voltage signal to produce an audio output signal varying at audio frequency;
transforming the audio output signal to produce an error signal; and
responsive to the error signal, inputting a control signal to the electrostatic acoustic device, wherein phase and amplitude of the control signal are configured to cancel at least in part a mechanical response of the membrane due to ambient noise.