US 10,853,027 B2Granted

Calibration of a playback device based on an estimated frequency response

AssigneeSonos, Inc.

InventorsShao-Fu Shih, Patrick McPherson

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Abstract

An example playback device is configured to receive a first stream of audio comprising source audio content to be played back by the playback device and record, via one or more microphones of the playback device, an audio signal output by the playback device based on the playback device playing the source audio content. The playback device is also configured to determine a transfer function between a frequency-domain representation of the first stream of audio and a frequency-domain representation of the recorded audio signal, and then determine an estimated frequency response of the playback device based on a difference between (i) the transfer function and (ii) a self-response of the playback device, where the self-response of the playback device is stored in a memory of the playback device. Based on the estimated frequency response, the playback device is configured to determine an acoustic calibration adjustment and implement the acoustic calibration adjustment.

Claims20

Dependent claims

A playback device comprising:

at least one processor;
non-transitory computer-readable medium;
and
program instructions stored on the non-transitory computer-readable medium that are executable by the at least one processor and thereby cause the playback device to be configured to:
receive a first stream of audio comprising source audio content to be played back by the playback device in a given playback environment;
record, via one or more microphones of the playback device, an audio signal output by the playback device based on the playback device playing the source audio content in the given playback environment;
determine a transfer function between a frequency-domain representation of the first stream of audio and a frequency-domain representation of the recorded audio signal;
determine an estimated frequency response of the playback device in the given playback environment based on a difference between (i) the transfer function and (ii) a self-response of the playback device, wherein the self-response of the playback device comprises a predetermined value stored in a memory of the playback device;
and
based on the estimated frequency response of the playback device in the given playback environment, determine an acoustic calibration adjustment for the playback device;
and
implement the acoustic calibration adjustment.

9 more elements

A non-transitory computer-readable medium, wherein the non-transitory computer-readable medium is provisioned with program instructions that are executable by at least one processor such that a playback device is configured to:

receive a first stream of audio comprising source audio content to be played back by the playback device in a given playback environment;
record, via one or more microphones of the playback device, an audio signal output by the playback device based on the playback device playing the source audio content in the given playback environment;
determine a transfer function between a frequency-domain representation of the first stream of audio and a frequency-domain representation of the recorded audio signal;
determine an estimated frequency response of the playback device in the given playback environment based on a difference between (i) the transfer function and (ii) a self-response of the playback device, wherein the self-response of the playback device comprises a predetermined value stored in a memory of the playback device;
and
based on the estimated frequency response of the playback device in the given playback environment, determine an acoustic calibration adjustment for the playback device;
and
implement the acoustic calibration adjustment.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/665,415Filed 28 Oct 2019 · continuation
Priority: 5 Aug 2016
Published: US 2020/0065059 A127 Feb 2020
Granted: 1 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

G06F 3/165
Sound input; Sound output: management of the audio stream, e.g. setting of volume, audio stream path
H04R 27/00
Public address systems
H04R 29/007
Monitoring arrangements; Testing arrangements: for public address systems
H04S 7/301
Control circuits for electronic adaptation of the sound field: automatic calibration of stereophonic sound system, e.g. with test microphone

Family

Application15/229,693Parent of this continuation · filed 5 Aug 2016
US 2020/0065059 A1Pre-grant publication · published 27 Feb 2020
US 10,459,684 B2Parent of this continuation
US 2018/0039474 A1Published application
US 10,853,027 B2This patent

From the US filing history. Foreign family members aren’t listed.