公开(公告)号：US20210005181A1

公开(公告)日：2021-01-07

申请号：US16892693

申请日：2020-06-04

Applicant: Knowles Electronics, LLC

Inventor： Adam Abed ,  Sib Sankar Dey ,  Sharon Gadonniex ,  Matthew Cowan ,  Karthigeyan Vaidyanathan ,  Douglas Vargha

IPC: G10L15/08 ,  G10L15/28 ,  G06F1/324 ,  G06F1/3206

Abstract: The disclosure describes keyword detection in an audio processor and methods therefor including a low-power keyword detection engine (LKDE) and a high-power keyword detection engine (HKDE). In one implementation, the LKDE detects a keyword in data from a single audio source while buffering data from multiple audio sources and, upon detection of a keyword, the HKDE is awakened to verify the previously detected keyword by processing the buffered audio data from the multiple sources.

公开(公告)号：US11438682B2

公开(公告)日：2022-09-06

申请号：US17274732

申请日：2019-09-10

Applicant: Knowles Electronics, LLC

Inventor： Adam Abed ,  Edwin Cordon ,  Niel Warren ,  Donald Sanders ,  Maulik Patel ,  Dushyant Liya

IPC: H04R3/00 ,  H04R1/08 ,  G06F3/00 ,  G06F3/05 ,  G06F3/16

Abstract: A microphone assembly includes a housing including a base, a cover, and a sound port. The microphone assembly further includes an acoustic transducer and an electrical circuit, both of which are disposed in an enclosed volume of the housing. The transducer and electrical circuit work in concert to convert sound waves into a processed digital audio signal. The electrical circuit is configured to process digital data in a series of frames that correspond to a fixed period in time. The electrical circuit is further configured to reduce noise in the resulting signal by varying the current draw required in a randomized or pseudo-randomized fashion between adjacent frames of digital data.

公开(公告)号：US20210352391A1

公开(公告)日：2021-11-11

申请号：US17274732

申请日：2019-09-10

Applicant: Knowles Electronics, LLC

Inventor： Adam Abed ,  Edwin Cordon ,  Niel Warren ,  Donald Sanders ,  Maulik Patel ,  Dushyant Liya

IPC: H04R1/08

Abstract: A microphone assembly includes a housing including a base, a cover, and a sound port. The microphone assembly further includes an acoustic transducer and an electrical circuit, both of which are disposed in an enclosed volume of the housing. The transducer and electrical circuit work in concert to convert sound waves into a processed digital audio signal. The electrical circuit is configured to process digital data in a series of frames that correspond to a fixed period in time. The electrical circuit is further configured to reduce noise in the resulting signal by varying the current draw required in a randomized or pseudo-randomized fashion between adjacent frames of digital data.