公开(公告)号：US10262673B2

公开(公告)日：2019-04-16

申请号：US15886288

申请日：2018-02-01

Applicant: Knowles Electronics, LLC

Inventor： Jonathon Ray ,  Anil Kumar Yadav

IPC: G10L21/0208 ,  G10L21/0232 ,  G10L21/0216

Abstract: A method for reducing noise within an acoustic signal includes receiving at least a primary acoustic signal from a primary microphone and a secondary acoustic signal from a different, secondary microphone, wherein the primary acoustic signal includes a speech component emanating from a user and a noise component. The method also includes measuring a first value of a first coefficient based on the primary and secondary signals and performing a noise cancellation process based on the measured first value of the first coefficient to produce a set of noise-cancelled primary sub-bands. The method also includes generating, by the processor, a set of multiplicative gain mask values, the multiplicative gain mask values having a frequency dependency that is based at least in part on a pre-indicated approximate sound pressure level of the speech component.

公开(公告)号：US20180233158A1

公开(公告)日：2018-08-16

申请号：US15886288

申请日：2018-02-01

Applicant: Knowles Electronics, LLC

Inventor： Jonathon Ray ,  Anil Kumar Yadav

IPC: G10L21/0208

CPC classification number: G10L21/0208 ,  G10L21/0232 ,  G10L2021/02165

Abstract: A method for reducing noise within an acoustic signal includes receiving at least a primary acoustic signal from a primary microphone and a secondary acoustic signal from a different, secondary microphone, wherein the primary acoustic signal includes a speech component emanating from a user and a noise component. The method also includes measuring a first value of a first coefficient based on the primary and secondary signals and performing a noise cancellation process based on the measured first value of the first coefficient to produce a set of noise-cancelled primary sub-bands. The method also includes generating, by the processor, a set of multiplicative gain mask values, the multiplicative gain mask values having a frequency dependency that is based at least in part on a pre-indicated approximate sound pressure level of the speech component.