Off-ear and on-ear headphone detection
AssigneeAvnera Corporation
InventorsAmit Kumar, Eric Sorensen, Shankar Rathoud
Life of this patent
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Abstract
A headphone detector including a headphone and a processor. The headphone has a microphone and a speaker, and the microphone is configured to generate an audio signal based on an output of the speaker. The processor is configured to receive the audio signal, determine a characteristic of the audio signal, and assess whether the headphone is on ear or off ear based on a comparison of the characteristic to a threshold. The threshold corresponds to one or more of an audio response of the audio signal at a corresponding frequency and an audio response of a feedback microphone signal at a corresponding frequency, under one or more known conditions.
Claims13
A headphone detector comprising:
- a headphone having a microphone and a speaker, the microphone configured to generate an audio signal based on an output of the speaker, in which the microphone includes a feedback microphone configured to sample the output of the speaker;
- and
- a processor configured to receive the audio signal, determine a characteristic of the audio signal, and assess whether the headphone is on ear or off ear based on a comparison of the characteristic to a threshold;
- wherein the threshold corresponds to one or more of an audio response of the audio signal at a corresponding frequency and an audio response of a feedback microphone signal at a corresponding frequency, under one or more known conditions.
A method of detecting whether a headphone is off ear or on ear, the method comprising:
- producing an acoustic signal at a headphone based at least in part on a received headphone audio signal;
- generating, at the headphone, a feedback microphone signal, in which the feedback microphone signal is based at least in part on the acoustic signal;
- determining, with the processor, a characteristic of the headphone audio signal and a characteristic of the feedback microphone signal, wherein the characteristics include an audio response at a corresponding frequency;
- and
- assessing, with the processor, whether the headphone is off ear or on ear based at least in part on an audio response of the headphone audio signal and an audio response of the feedback microphone signal.
Dependencies are inferred from the claim text.