公开(公告)号：US20240096340A1

公开(公告)日：2024-03-21

申请号：US18086555

申请日：2022-12-21

Applicant: Meta Platforms Technologies, LLC

Inventor： Sarmad Aziz Malik ,  Syavosh Zadissa ,  Xiaofei Chen

IPC: G10L21/02

CPC classification number: G10L21/02

Abstract: A system suppresses howl in a device including microphones and speakers, for example, an artificial reality headset. A speaker of the device presents audio content. The audio content presented by the speaker is received by a microphone of the device thereby creating a howl in certain situations. The system detects the presence of the howl in a region of the audio content using an adaptive notch filter. The system suppresses the howl by reducing gain of one or more frequencies of the audio content. The system may detect presence of the howl by monitoring flatness of the signal. The system may detect presence of the howl based on tonality detection based on linear prediction