US 11,671,741 B2
In-ear detection utilizing earbud feedback microphone
Gabriel Seiden, Rehovot (IL)
Assigned to DSP GROUP LTD.
Filed by DSP Group Ltd., Herzliya (IL)
Filed on Sep. 28, 2022, as Appl. No. 17/936,218.
Application 17/936,218 is a continuation of application No. 17/169,317, filed on Feb. 5, 2021, granted, now 11,503,398.
Claims priority of provisional application 62/971,242, filed on Feb. 7, 2020.
Prior Publication US 2023/0021144 A1, Jan. 19, 2023
Int. Cl. H04R 1/10 (2006.01); H04R 29/00 (2006.01)
CPC H04R 1/1041 (2013.01) [H04R 29/00 (2013.01); H04R 2201/109 (2013.01); H04R 2400/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for in-ear detection of an earbud, the method comprises:
transmitting, via a speaker of the earbud, a plurality of test signals associated with a plurality of frequency ranges, respectively;
sensing the plurality of test signals via a feedback microphone of the earbud;
determining, based on the sensed test signals, a plurality of spectrums associated with the plurality of frequency ranges, respectively;
determining a deviation of a first spectrum of the plurality of spectrums from a first reference out of ear spectrum;
determining a deviation of a second spectrum of the plurality of spectrums from a second reference out of ear spectrum; and
determining whether the earbud is located in a user's ear based at least in part on the deviation of the first spectrum from the first reference out of ear spectrum and the deviation of the second spectrum from the second reference out of ear spectrum, the earbud being determined to be located in the user's ear when the deviation of the first spectrum is greater than a first threshold and the deviation of the second spectrum is less than a second threshold.