Method for tuning a noise cancellation enabled audio system and noise cancellation enabled audio system
AssigneeSamsung Electronics Co., Ltd.
InventorRobert Alcock
Life of this patent
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Abstract
In a method for tuning at least one parameter of a noise cancellation enabled audio system with an ear mountable playback device comprising a speaker and a feedforward microphone the playback device is placed onto a measurement fixture, the speaker facing a test microphone located within an ear canal representation. The parameter is varied between a plurality of settings while a test sound is played. A measurement signal from the test microphone is received and stored in the audio system at least while the parameter is varied. A power minimum in the stored measurement signal and a tune parameter associated with the power minimum are determined in the audio system from the plurality of settings of the varied parameter.
Claims20
A method for tuning at least one parameter of an audio system, which is enabled for active noise cancellation and includes an audio processor and an ear mountable playback device comprising a speaker and a feedforward microphone, the method comprising:
- placing the playback device onto a measurement fixture, wherein the speaker faces an ear canal representation of the measurement fixture and a test microphone located within the ear canal representation;
- varying, in the audio processor, which is associated with the active noise cancellation at the speaker, the parameter between a plurality of settings while a test sound is played from an ambient sound source, wherein playing of the test sound via the ambient sound source is independent from the audio system and the measurement fixture at least in terms of control and signals;
- receiving and storing, in the audio processor, a measurement signal from the test microphone at least while the parameter is varied;
- determining, in the audio processor, a power minimum in the stored measurement signal;
- and
- determining, in the audio processor, from the plurality of settings of the varied parameter a tune parameter associated with the power minimum, wherein
- during a calibration mode of operation of the audio system, the measurement signal is received over an audio input of the audio system, and wherein
- during a regular mode of operation of the audio system, a useful audio signal to be played over the speaker is received via the audio input.
An active noise cancellation enabled audio system with an audio processor and an ear mountable playback device comprising a speaker and a feedforward microphone, the audio system being configured to be operated in a regular mode of operation and in a calibration mode of operation, wherein the audio processor comprises an audio input and is configured for, in the calibration mode of operation,
- varying a parameter, which is associated with the active noise cancellation at the speaker, between a plurality of settings while a test sound is played from an ambient sound source and the playback device is placed onto a measurement fixture, the speaker facing an ear canal representation of the measurement fixture and a test microphone located within the ear canal representation, wherein playing of the test sound via the ambient sound source is independent from the audio system and the measurement fixture at least in terms of control and signals;
- receiving, via the audio input, and storing a measurement signal from the test microphone at least while the parameter is varied;
- determining a power minimum in the stored measurement signal;
- and
- determining from the plurality of settings of the varied parameter a tune parameter associated with the power minimum, and
- wherein the audio processor is configured for, in the regular mode of operation, for receiving a useful audio signal via the audio input to be played over the speaker.
Dependencies are inferred from the claim text.