Acoustic and surface vibration authentication
First Claim
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1. A portable electronic communication device comprising:
- an audio microphone associated with the portable electronic communication device and configured and located to produce a first signal corresponding to a user'"'"'s voice when the portable electronic communication device is in use by the user;
a surface microphone associated with the portable electronic communication device and configured and located to produce a second signal corresponding to audio vibrations of the user'"'"'s tissue from the user'"'"'s voice when the portable electronic communication device is in use by the user; and
a processor configured to generate a transfer function relating the first signal to the second signal and to identify the user as authorized or unauthorized based on the transfer function.
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Abstract
Systems and methods for authorizing a user of a portable communications device entail sampling a user utterance via both an air mic (audio mic) and a conduction mic (surface mic or bone conduction mic). The difference between these signals is unique to each user since the tissues of each user will differ with respect to audio conduction. This difference may be characterized via a transform including magnitude, phase and time delay components. If the transform for a prospective user matches a stored transform for an authorized user, then the prospective user may be granted access.
19 Citations
17 Claims
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1. A portable electronic communication device comprising:
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an audio microphone associated with the portable electronic communication device and configured and located to produce a first signal corresponding to a user'"'"'s voice when the portable electronic communication device is in use by the user; a surface microphone associated with the portable electronic communication device and configured and located to produce a second signal corresponding to audio vibrations of the user'"'"'s tissue from the user'"'"'s voice when the portable electronic communication device is in use by the user; and a processor configured to generate a transfer function relating the first signal to the second signal and to identify the user as authorized or unauthorized based on the transfer function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of authorizing a user to use a portable electronic device comprising:
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sampling a user utterance from an authorized user through both an audio microphone and a surface microphone positioned on the authorized user'"'"'s body to produce respective first and second signals; generating a characterization of a difference between the first and second signals; storing the generated characterization; sampling a user utterance from a prospective user through both the audio microphone and the surface microphone, with the surface microphone being positioned on the prospective user'"'"'s body to produce respective third and fourth signals; and determining that the prospective user is the authorized user if the third and fourth signals are related by the stored characterization. - View Dependent Claims (15, 16, 17)
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Specification