Patent ID: 9661424
Date: 2017-05-23
CPC Classifications: G08C,G10L,H04R

Claim:
1. A device comprising: an optical microphone to transmit a laser beam towards a human speaker, to receive an optical feedback signal reflected back from said human speaker, and to perform self-mixing interferometry between the transmitted laser beam and the received optical feedback signal; an optical feedback signal bandwidth enhancer to enhance a bandwidth of the optical feedback signal; wherein the optical feedback signal bandwidth enhancer comprises: an accessory detector to detect that a body region of the human speaker, that is hit by the transmitted laser beam, is obstructed by an accessory article; an optical beam aiming unit to selectively modify an aiming of the transmitted laser beam, from hitting said first body region of the human speaker that is obstructed by the accessory article, to hitting another body region of the human speaker that is not obstructed by said accessory article.