MONITORING OF SPEAKER IMPEDANCE TO DETECT PRESSURE APPLIED BETWEEN MOBILE DEVICE AND EAR
First Claim
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1. A method, comprising:
- calculating an impedance of a speaker of a mobile device; and
determining a force, applied by a user of the mobile device, that causes contact between the mobile device and the user based, at least in part, on the calculated impedance.
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Abstract
Coupling between a user'"'"'s ear and a speaker of a mobile device may be determined by measuring an impedance of the speaker. When the user presses the mobile device against the user'"'"'s ear, the speaker impedance changes as a result of loading in the speaker'"'"'s acoustic radiation impedance. The speaker impedance change may be correlated with the force applied by the user to the mobile device. The measured speaker impedance may be provided as feedback to an adaptive noise cancellation (ANC) algorithm to adjust the output at the speaker. For example, when the mobile device is removed from the user'"'"'s ear, the ANC algorithm may be muted.
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Citations
20 Claims
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1. A method, comprising:
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calculating an impedance of a speaker of a mobile device; and determining a force, applied by a user of the mobile device, that causes contact between the mobile device and the user based, at least in part, on the calculated impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus, comprising:
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a speaker; an amplifier coupled to the speaker; a processor coupled to the amplifier, in which the processor is configured to execute the steps comprising; calculating an impedance of the speaker; and determining an environmental load of the speaker based, at least in part, on the calculated impedance. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A computer program product, comprising:
a non-transitory computer readable medium comprising code to execute the steps comprising; calculating an impedance of a speaker; and determining an environmental load of the speaker based, at least in part, on the calculated impedance. - View Dependent Claims (17, 18, 19, 20)
Specification