US 12,088,266 B2
Systems and methods of volume limiting
Aurelio Ramos, Jamaica Plain, MA (US)
Assigned to Sonos, Inc., Santa Barbara, CA (US)
Filed by Sonos, Inc., Santa Barbara, CA (US)
Filed on Jun. 30, 2023, as Appl. No. 18/345,671.
Application 18/345,671 is a continuation of application No. 17/096,689, filed on Nov. 12, 2020, granted, now 11,716,065.
Application 17/096,689 is a continuation of application No. 15/943,064, filed on Apr. 2, 2018, granted, now 10,862,446, issued on Dec. 8, 2020.
Prior Publication US 2023/0353113 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03G 11/00 (2006.01); H03G 3/30 (2006.01); H03G 7/00 (2006.01); H03G 9/02 (2006.01); H04R 3/00 (2006.01); H04H 40/54 (2008.01)
CPC H03G 11/00 (2013.01) [H03G 3/3005 (2013.01); H03G 7/002 (2013.01); H03G 9/025 (2013.01); H04R 3/007 (2013.01); H03G 2201/103 (2013.01); H04R 2430/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An audio signal processing system for a playback device, the system comprising:
a gain stage configured to (i) receive an incoming first audio signal and a control signal and (ii) generate a second audio signal, wherein generating the second audio signal comprises adjusting a gain of the first audio signal based at least in part on the control signal;
a dynamic bass control stage configured to (i) receive the second audio signal and (ii) generate a third audio signal, wherein generating the third audio signal comprises attenuating a low-frequency portion of the second audio signal;
a wideband limiter configured to (i) receive the third audio signal and (ii) generate a fourth audio signal, wherein generating the fourth audio signal comprises reducing a gain of the third audio signal;
a feedback controller configured to produce a control signal based at least in part on a gain reduction applied via the limiter and to provide the control signal to the gain stage; and
an audio amplifier configured to cause audio to be played back based on the fourth audio signal.