CPC G10L 25/51 (2013.01) [B60R 11/02 (2013.01); G01P 15/0907 (2013.01); G10K 11/17873 (2018.01); H04R 1/08 (2013.01); H04R 1/406 (2013.01); H04R 3/005 (2013.01); B60R 2011/004 (2013.01); G10K 2210/12821 (2013.01); G10K 2210/3027 (2013.01); H04R 2499/13 (2013.01)] | 16 Claims |
1. A system comprising:
a microphone unit, the microphone unit comprising:
a microphone board having a first opening, a second opening, and a third opening;
a first microphone positioned over the first opening and coupled to the microphone board;
a second microphone positioned over the second opening and coupled to the microphone board;
a third microphone positioned over the third opening and coupled to the microphone board; and
an accelerometer coupled to the microphone board, wherein the accelerometer comprises:
a housing having an internal cavity;
a first electrode positioned atop a bottom surface of the internal cavity of the housing;
a piezoelectric material positioned atop the first electrode;
a second electrode positioned atop the piezoelectric material;
a mass positioned atop the second electrode; and
a spring plate positioned atop the mass; and
a processor coupled to the microphone unit.
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