ON/OFF HEAD DETECTION OF PERSONAL ACOUSTIC DEVICE USING AN EARPIECE MICROPHONE
First Claim
1. A method of controlling a personal acoustic device comprising:
- generating a first electrical signal responsive to an acoustic signal incident at a microphone disposed at a location on an earpiece of the personal acoustic device such that the microphone is acoustically coupled to an environment external to the earpiece;
determining a characteristic of a transfer function based on the first electrical signal and a second electrical signal provided to a speaker in the earpiece; and
determining an operating state of the personal acoustic device based on the characteristic of the transfer function, the operating state comprising at least a first state in which the earpiece is positioned in the vicinity of an ear of a user and a second state in which the earpiece is absent from the vicinity of the ear.
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Accused Products
Abstract
A method of controlling a personal acoustic device includes generating a first electrical signal responsive to an acoustic signal incident at a microphone disposed at a location on an earpiece of the personal acoustic device such that the microphone is acoustically coupled to an environment external to the earpiece. A characteristic of a transfer function based on the first electrical signal and a second electrical signal provided to a speaker in the earpiece is determined. An operating state of the personal acoustic device is determined form the characteristic of the transfer function. The operating state include a state in which the earpiece is positioned in the vicinity of an ear of a user and a second state in which the earpiece is absent from the vicinity of the ear of the user.
6 Citations
20 Claims
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1. A method of controlling a personal acoustic device comprising:
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generating a first electrical signal responsive to an acoustic signal incident at a microphone disposed at a location on an earpiece of the personal acoustic device such that the microphone is acoustically coupled to an environment external to the earpiece; determining a characteristic of a transfer function based on the first electrical signal and a second electrical signal provided to a speaker in the earpiece; and determining an operating state of the personal acoustic device based on the characteristic of the transfer function, the operating state comprising at least a first state in which the earpiece is positioned in the vicinity of an ear of a user and a second state in which the earpiece is absent from the vicinity of the ear. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A personal acoustic device comprising:
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an earpiece having a microphone and configured for attachment to a head of a user or an ear of the user, the microphone disposed at a location on the earpiece such that the microphone is acoustically coupled to an environment external to the earpiece, the microphone configured to generate a first electrical signal responsive to an acoustic signal incident at the microphone, the earpiece having a speaker configured to generate an audio signal in response to a second electrical signal; and a control circuit in communication with the microphone to receive the first electrical signal and in communication with the speaker for providing the second electrical signal, the control circuit configured to; determine a characteristic of a transfer function based on the first electrical signal and the second electrical signal; and determine an operating state of the personal acoustic device based on the characteristic of the transfer function, the operating state comprising at least a first state in which the earpiece is positioned in the vicinity of the ear and a second state in which the earpiece absent from the vicinity of the ear. - View Dependent Claims (18, 19, 20)
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Specification