| CPC A61B 5/1171 (2016.02) [A61B 5/6815 (2013.01); G06F 21/32 (2013.01); H04R 1/1016 (2013.01); H04R 25/30 (2013.01); G10L 17/24 (2013.01)] | 21 Claims |
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1. One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause:
emitting, by an in-ear device, a first acoustic signal;
detecting, by the in-ear device, a first otic response to the first acoustic signal;
generating a first user signature, based at least on the first otic response to the first acoustic signal;
performing a comparison of the first user signature and a second user signature associated with the in-ear device, to determine whether the in-ear device has changed users, wherein performing the comparison includes:
determining a difference between the first user signature and the second user signature in a frequency domain at each of a plurality of frequencies of the first user signature and the second user signature,
determining a similarity metric between the first user signature and the second user signature based on the difference between the first user signature and the second user signature in the frequency domain at at least one frequency of the plurality of frequencies of the first user signature and the second user signature, and
determining whether the in-ear device has changed users by comparing the similarity metric to a classification threshold; and
responsive to determining that the in-ear device has changed users, transmitting an alert to an entity that provides one or more services associated with the in-ear device.
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