Patent ID: 11961535
Assignee: INTEL CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. A system for prevention of laser-based audio attacks, the system comprising:
a cross correlation circuit to calculate cross correlations between signals received from a plurality of microphones of an array of microphones;
a peak finding circuit to identify time delays associated with peaks of the cross correlations and magnitudes associated with the peaks of the cross correlations;
a time alignment circuit to calculate a time alignment metric based on the time delays;
a similarity metric circuit to calculate a similarity metric based on the magnitudes;
a thresholding circuit to generate a first attack indicator based on a comparison of the time alignment metric to a first threshold and to generate a second attack indicator based on a comparison of the similarity metric to a second threshold; and
an attack notification circuit to provide warning of a laser-based audio attack based on the first attack indicator and/or the second attack indicator.