公开(公告)号：US20230308819A1

公开(公告)日：2023-09-28

申请号：US18126938

申请日：2023-03-27

Applicant: Qualcomm Technologies Inc.

Inventor： Robert J. LITTRELL

IPC: H04R29/00 ,  G10L25/21 ,  G10L25/18 ,  H04R17/02 ,  G10L25/78 ,  H04R19/04

CPC classification number: H04R29/004 ,  G10L25/21 ,  G10L25/18 ,  H04R17/02 ,  G10L25/78 ,  H04R19/04 ,  H04R2201/003

Abstract: An acoustic device is described and includes an acoustic sensor element configured to sense acoustic energy and produce an output signal and a threshold detector circuit including a switch having an input coupled to the output of the acoustic sensor element to receive the output signal, a control port that receives a control signal, and first and second output ports, a first channel including an analog-to-digital converter that operates at a first power level a second analog-to-digital converter that operates at a second higher power level, relative to the first power level and a threshold level detector that receives an output from the first analog-to-digital converter to produce the control signal having a first state that causes the switch feed the output signal from the acoustic sensor element to the second analog-to-digital converter when the first digitized output signal meets a threshold criteria.