Invention Grant
- Patent Title: Headphone off-ear detection
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Application No.: US15984068Application Date: 2018-05-18
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Publication No.: US10200776B2Publication Date: 2019-02-05
- Inventor: Amit Kumar , Shankar Rathoud , Mike Wurtz , Eric Etheridge , Eric Sorensen
- Applicant: Avnera Corporation
- Applicant Address: US OR Beaverton
- Assignee: AVNERA CORPORATION
- Current Assignee: AVNERA CORPORATION
- Current Assignee Address: US OR Beaverton
- Agency: Miller Nash Graham & Dunn LLP
- Main IPC: H04R1/10
- IPC: H04R1/10 ; G10K11/178 ; H04R3/00 ; H04R29/00

Abstract:
Disclosed is a signal processor for headphone off-ear detection. The signal processor includes an audio output to transmit an audio signal toward a headphone speaker in a headphone cup. The signal processor also includes a feedback (FB) microphone input to receive a FB signal from a FB microphone in the headphone cup. The signal processor also includes an off-ear detection (OED) signal processor to determine an audio frequency response of the FB signal over an OED frame as a received frequency response. The OED processor also determines an audio frequency response of the audio signal times an off-ear transfer function between the headphone speaker and the FB microphone as an ideal off-ear response. A difference metric si generated comparing the received frequency response to the ideal off-ear frequency response. The difference metric is employed to detect when the headphone cup is disengaged from an ear.
Public/Granted literature
- US20180270564A1 HEADPHONE OFF-EAR DETECTION Public/Granted day:2018-09-20
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