US 11,812,239 B2
Dynamic reduction of loudspeaker distortion based on psychoacoustic masking
Meir Shaashua, Tel Aviv (IL); Itai Neoran, Beit-Hananya (IL); and Matan Ben-Asher, Yahud (IL)
Assigned to WAVES AUDIO LTD., Tel Aviv (IL)
Appl. No. 17/608,110
Filed by WAVES AUDIO LTD., Tel Aviv (IL)
PCT Filed Apr. 30, 2020, PCT No. PCT/IL2020/050487
§ 371(c)(1), (2) Date Nov. 1, 2021,
PCT Pub. No. WO2020/222242, PCT Pub. Date Nov. 5, 2020.
Claims priority of provisional application 62/840,490, filed on Apr. 30, 2019.
Prior Publication US 2022/0312114 A1, Sep. 29, 2022
Int. Cl. H04R 3/04 (2006.01); H04R 29/00 (2006.01)
CPC H04R 3/04 (2013.01) [H04R 29/001 (2013.01); H04R 2430/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A processor-based method of producing an audio signal of reduced harmonic distortion from a loudspeaker, the method comprising:
a) detecting, in an input audio band to the loudspeaker, a harmonic frequency band including one or more frequencies that are integer multiples of a first fundamental frequency;
b) dynamically attenuating a first fundamental frequency band of the input audio signal by an attenuation amount, the first fundamental frequency band including the first fundamental frequency, wherein the attenuation amount is at least partly determined from
an energy of the harmonic frequency band of the input audio signal,
thereby producing an adjusted audio signal usable for input to the loudspeaker.