公开(公告)号：US10979812B2

公开(公告)日：2021-04-13

申请号：US16954123

申请日：2018-12-07

Applicant: GN Audio A/S ,  Mads Dyrholm ,  Allan Mejlgren Von Bülow

Inventor： Mads Dyrholm ,  Allan Mejlgren Von Bulow

IPC: H04R25/00 ,  H04R5/033 ,  G10L21/0232 ,  H04R1/10 ,  G10L21/0216

Abstract: A headset adapted to transmitting an outgoing audio signal (Tx) and comprising a voice microphone and at least one ambient microphone. The headset comprises an ambient noise reduction block (ANR), which is adapted to reduce the level of ambient noise in the outgoing audio signal (Tx). The ambient noise reduction block (ANR) includes the measuring the levels of the voice microphone signal (X) and ambient microphone signal (Y) to estimate a characteristic constant level drop between the voice microphone signal (X) and the ambient microphone signal (Y), which is characteristic for the headset user talking. A time-varying filter passes the voice microphone signal (X), when the level difference is larger than characteristic constant level drop (CLD) and attenuates the voice microphone signal (X), if the level difference is below characteristic constant level drop.

公开(公告)号：US20200382870A1

公开(公告)日：2020-12-03

申请号：US16954123

申请日：2018-12-07

Applicant: Mads DYRHOLM ,  Allan Mejlgren VON BÜLOW ,  GN Audio A/S

Inventor： Mads DYRHOLM ,  Allan Mejlgren VON BULOW

IPC: H04R5/033 ,  G10L21/0232 ,  H04R1/10

Abstract: A headset adapted to transmitting an outgoing audio signal (Tx) and comprising a voice microphone and at least one ambient microphone. The headset comprises an ambient noise reduction block (ANR), which is adapted to reduce the level of ambient noise in the outgoing audio signal (Tx). The ambient noise reduction block (ANR) includes the measuring the levels of the voice microphone signal (X) and ambient microphone signal (Y) to estimate a characteristic constant level drop between the voice microphone signal (X) and the ambient microphone signal (Y), which is characteristic for the headset user talking. A time-varying filter passes the voice microphone signal (X), when the level difference is larger than characteristic constant level drop (CLD) and attenuates the voice microphone signal (X), if the level difference is below characteristic constant level drop.