US 12,238,475 B2
Acoustic resonators for microphones
Justin D. Crosby, Cupertino, CA (US); Kevin M. Froese, Madison, WI (US); and Tzu Hung Huang, Campbell, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jan. 24, 2022, as Appl. No. 17/583,135.
Prior Publication US 2023/0239610 A1, Jul. 27, 2023
Int. Cl. H03H 9/205 (2006.01); H04R 1/04 (2006.01); H04R 1/28 (2006.01); H04M 1/02 (2006.01)
CPC H04R 1/2876 (2013.01) [H03H 9/205 (2013.01); H04R 1/04 (2013.01); H04M 1/026 (2013.01); H04R 2499/11 (2013.01); H04R 2499/15 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device, comprising:
an enclosure having an opening and a sidewall;
a microphone module mounted within the enclosure adjacent the opening, the microphone module having an actuatable sound-generating component that is offset from the opening in the enclosure;
a cavity formed in the sidewall, the cavity running along an interior wall of the enclosure in a direction away from the opening; and
a damping feature within a portion of the cavity.
 
8. An electronic device, comprising:
an enclosure comprising:
a housing that defines an opening; and
a transparent outer layer separated from the housing by a gap, the transparent outer layer comprising a patterned edge;
a microphone module mounted within the enclosure adjacent the opening; and
a cavity that runs along an interior wall of the enclosure in a direction away from the opening,
wherein the transparent outer layer partially defines the cavity, and based in part on the patterned edge, the transparent outer layer partially defines the gap.
 
14. An electronic device, comprising:
a housing;
a cover layer mounted to the housing;
a display module covered by the cover layer, wherein the display module comprises a support structure;
a microphone within the housing;
a resonant cavity within the housing, separate from the microphone, and acoustically coupled to the microphone, wherein the resonant cavity is defined in part by the housing and the support structure; and
a damping material that at least partially fills a portion of the resonant cavity.