Headset on ear state detection
AssigneeCirrus Logic, Inc.
InventorsVitaliy Sapozhnykov, Thomas Ivan Harvey, Nafiseh Erfaniansaeedi, Robert Luke
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Abstract
A method and device for detecting whether a headset is on ear. A probe signal is generated for acoustic playback from a speaker. A microphone signal from a microphone is received, the microphone signal comprising at least a portion of the probe signal as received at the microphone. The microphone signal is passed to a state estimator, to produce an estimate of at least one parameter of the portion of the probe signal contained in the microphone signal. The estimate of the at least one parameter is processed to determine whether the headset is on ear.
Claims20
A method for on ear detection for a headset, the method comprising:
- generating a probe signal for acoustic playback from a speaker, wherein the probe signal is confined to a frequency range which is inaudible;
- receiving a feedback signal from a feedback microphone, the feedback microphone signal comprising at least a portion of the probe signal as received at the feedback microphone;
- applying state estimation to the feedback microphone signal to produce an estimate of at least one parameter of the portion of the probe signal contained in the feedback microphone signal, and
- determining from the estimate of the at least one parameter whether the headset is on ear;
- wherein a level of the probe signal is dynamically reduced upon detection of an increase in a level of the feedback microphone signal.
A signal processing device for on ear detection for a headset, the device comprising:
- a probe signal generator configured to generate a probe signal for acoustic playback from a speaker, wherein the probe signal is confined to a frequency range which is inaudible;
- an input for receiving a feedback microphone signal from a feedback microphone, the feedback microphone signal comprising at least a portion of the probe signal as received at the feedback microphone;
- and
- a processor configured to generate a noise cancellation signal based at least in part on the probe signal received at the feedback microphone and configured to apply state estimation to the feedback microphone signal to produce an estimate of at least one parameter of the portion of the probe signal contained in the feedback microphone signal, the processor further configured to process the estimate of the at least one parameter to determine whether the headset is on ear;
- wherein the processor is configured to cause a level of the probe signal to be dynamically reduced upon detection of an increase in a level of the feedback microphone signal.
A non-transitory computer readable medium for on ear detection for a headset, comprising instructions which, when executed by one or more processors, causes performance of the following:
- generating a probe signal for acoustic playback from a speaker, wherein the probe signal is confined to a frequency range which is inaudible;
- receiving a feedback microphone signal from a feedback microphone, the feedback microphone signal comprising at least a portion of the probe signal as received at the feedback microphone;
- applying state estimation to the feedback microphone signal to produce an estimate of at least one parameter of the portion of the probe signal contained in the feedback microphone signal, and
- determining from the estimate of the at least one parameter whether the headset is on ear;
- wherein a level of the probe signal is dynamically reduced upon detection of an increase in a level of the feedback microphone signal.
A system for on ear detection for a headset, the system comprising a processor and a memory, the memory containing instructions executable by the processor and wherein the system is operative to:
- generate a probe signal for acoustic playback from a speaker, wherein the probe signal is confined to a frequency range which is inaudible;
- receive a feedback microphone signal from a feedback microphone, the feedback microphone signal comprising at least a portion of the probe signal as received at the feedback microphone;
- apply state estimation to the feedback microphone signal to produce an estimate of at least one parameter of the portion of the probe signal contained in the feedback microphone signal, and
- determine from the estimate of the at least one parameter whether the headset is on ear;
- wherein a level of the probe signal is dynamically reduced upon detection of an increase in a level of the feedback microphone signal.
Dependencies are inferred from the claim text.