公开(公告)号：US20190227614A1

公开(公告)日：2019-07-25

申请号：US16337300

申请日：2017-09-26

Applicant: Dolphin Integration

Inventor： Emmanuel GRAND

IPC: G06F1/3234 ,  H03G3/30 ,  G10L25/78 ,  G10L15/28

Abstract: A circuit for sound activity detection includes a transducer adapted to generate an electrical signal based on detected sound; a variable gain amplifier adapted to amplify the electrical signal to generate an amplified electrical signal; a comparator adapted to compare the amplified electrical signal with at least one first threshold level to generate a comparison signal indicating comparator events; and a control circuit adapted to generate, based on the comparison signal, a gain control signal for controlling the gain of the variable gain amplifier, and a sound activity alert signal indicating the detection of sound activity.