US 12,425,767 B2
Selective acoustic optimization for thermally or power limited speaker systems
Miles K. Roberto, Austin, TX (US); Chris Rattray, Newbury (GB); Zhengyi Xu, Fleet (GB); and Philip B.J. Clarkin, Austin, TX (US)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on May 3, 2022, as Appl. No. 17/735,419.
Claims priority of provisional application 63/292,172, filed on Dec. 21, 2021.
Prior Publication US 2023/0199384 A1, Jun. 22, 2023
Int. Cl. H04R 3/00 (2006.01); G01K 3/10 (2006.01); H04R 3/04 (2006.01); H04R 29/00 (2006.01)
CPC H04R 3/007 (2013.01) [G01K 3/10 (2013.01); H04R 3/04 (2013.01); H04R 29/001 (2013.01); H04R 2430/01 (2013.01)] 14 Claims
OG exemplary drawing
 
8. A method comprising:
determining, based on temperature information associated with a transducer, a sub-band gain to be applied to a selected frequency band of a playback signal to be played back to the transducer, wherein the temperature information comprises a temperature associated with the transducer and a rate of change of the temperature associated with the transducer, and wherein the temperature and the rate of change are based on a monitored output voltage of the transducer and a monitored output current of the transducer;
applying the sub-band gain to the selected frequency band to generate a first intermediate signal;
applying a first full-band gain, in series with the sub-band gain, to the first intermediate signal based on a temperature associated with the transducer, to generate a second intermediate signal; and
applying a full-band gain by a power limiter, in addition to series with the sub-band gain and the first full-band gain, to the playback second intermediate signal based on a power consumption associated with the transducer, wherein application of the full-band gain is conditioned on the temperature exceeding a threshold temperature, to generate an output signal.