US 11,902,747 B1
Hearing loss amplification that amplifies speech and noise subsignals differently
Nicholas Morris, Brooklyn, NY (US); Igor Lovchinsky, New York, NY (US); and Andrew J. Casper, Clinton, CT (US)
Assigned to Chromatic Inc., New York, NY (US)
Filed by Chromatic Inc., New York, NY (US)
Filed on Aug. 8, 2023, as Appl. No. 18/366,851.
Claims priority of provisional application 63/396,523, filed on Aug. 9, 2022.
Int. Cl. H04R 25/00 (2006.01); G10L 21/028 (2013.01)
CPC H04R 25/507 (2013.01) [G10L 21/028 (2013.01); H04R 25/43 (2013.01); H04R 25/70 (2013.01); H04R 2225/43 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for fitting a hearing aid, comprising:
performing a hearing test on a wearer and/or determining wearer preferences for listening to speech and noise;
generating, based on the hearing test and/or the wearer preferences for listening to speech, and using a speech fitting formula, a set of speech fitting curves;
generating, based on the hearing test and/or the wearer preferences for listening to noise, and using a noise fitting formula, a set of noise fitting curves; and
providing a hearing aid comprising:
neural network circuitry configured to implement a neural network trained to separate a speech subsignal and a noise subsignal from an input audio signal; and
digital processing circuitry comprising:
a speech wide-dynamic range compression (WDRC) pipeline configured to perform WDRC on the speech subsignal, the speech WDRC pipeline comprising:
a set of speech subsignal level estimation circuitry configured to determine levels of the speech subsignal; and
a set of speech subsignal amplification circuitry configured to apply the set of speech fitting curves to the speech subsignal based at least in part on the levels of the speech subsignal; and
a noise WDRC pipeline configured to perform WDRC on the noise subsignal, the noise WDRC pipeline comprising:
a set of noise subsignal level estimation circuitry configured to determine levels of the noise subsignal; and
a set of noise subsignal amplification circuitry configured to apply the set of noise fitting curves to the noise subsignal based at least in part on the levels of the noise subsignal;
wherein:
the speech fitting formula is different from the noise fitting formula; and
the set of speech fitting curves is different from the set of noise fitting curves.