US 12,445,763 B2
Second degree of freedom speaker for cavity resonance cancellation
Simon Porter, San Jose, CA (US); and Guangxin Tang, San Jose, CA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Dec. 22, 2022, as Appl. No. 18/086,881.
Claims priority of provisional application 63/391,561, filed on Jul. 22, 2022.
Prior Publication US 2024/0098404 A1, Mar. 21, 2024
Int. Cl. H04R 1/02 (2006.01); H04R 1/28 (2006.01); H04R 7/06 (2006.01)
CPC H04R 1/2811 (2013.01) [H04R 1/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A speaker comprising:
a membrane including a first region and a second region that when vibrated provides audio content through a cavity to a port that outputs the audio content to a local area of the speaker, the first region having a first breakup frequency higher than a resonance frequency of the cavity, and the second region having a second breakup frequency that is lower than the first breakup frequency and the resonance frequency of the cavity, such that for frequencies above the second breakup frequency the second region of the membrane generates audio content that mitigates a resonance of the cavity; and
a transducer configured to vibrate the membrane.