US 12,010,494 B1
Audio system to determine spatial audio filter based on user-specific acoustic transfer function
Darius A. Satongar, Santa Clara, CA (US); Martin E. Johnson, Los Gatos, CA (US); Peter Victor Jupin, Copenhagen (DK); Jonathan D. Sheaffer, Santa Clara, CA (US); and Gaëtan R. Lorho, Menlo Park, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Aug. 30, 2019, as Appl. No. 16/557,907.
Claims priority of provisional application 62/737,728, filed on Sep. 27, 2018.
Int. Cl. G06F 17/00 (2019.01); H04R 1/10 (2006.01); H04R 3/04 (2006.01); H04R 5/04 (2006.01); H04S 7/00 (2006.01)
CPC H04R 5/04 (2013.01) [H04R 1/1008 (2013.01); H04R 3/04 (2013.01); H04S 7/304 (2013.01); H04S 7/307 (2013.01); H04S 2420/01 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method, comprising:
driving, by one or more processors, a speaker of a headphone with an audio content signal to generate a sound, wherein the speaker is arranged to direct the sound into an ear of a user of the headphone;
capturing, by an external microphone of the headphone, the sound of the audio content signal as a microphone signal;
determining, by the one or more processors, an acoustic transfer function using the audio content signal and the microphone signal, the acoustic transfer function is based at least part on an acoustic path between the speaker and the external microphone; and
selecting, by the one or more processors, a spatial audio filter corresponding to a predetermined transfer function matching the acoustic transfer function, wherein the spatial audio filter includes one or more of a head-related transfer function (HRTF) or a headphone equalization (HpEQ) filter of the user.