公开(公告)号：US11032631B2

公开(公告)日：2021-06-08

申请号：US16505554

申请日：2019-07-08

Applicant: Avnera Corporation

Inventor： Deepika Kumari ,  Colin Michael Doolittle ,  Amit Kumar

IPC: H04R1/10 ,  H04R3/04 ,  H04R3/00 ,  H04R29/00 ,  H04R1/40 ,  G10L25/21 ,  G10K11/175

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 is 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.

公开(公告)号：US20200014996A1

公开(公告)日：2020-01-09

申请号：US16505554

申请日：2019-07-08

Applicant: Avnera Corporation

Inventor： Deepika Kumari ,  Colin Michael Doolittle ,  Amit Kumar

IPC: H04R1/10 ,  H04R3/04 ,  G10L25/21 ,  H04R29/00 ,  H04R1/40 ,  H04R3/00

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 is 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.