Patent ID: 9173039
Filing Date: 2015-10-27
Classification: H04R

Abstract:
1. An optical microphone for detecting an acoustic wave propagating through an environmental fluid by using a light wave, the optical microphone comprising: an acoustic wave receiving section including a propagation medium portion and a first support portion, wherein the propagation medium portion is formed by a solid propagation medium, has an incidence surface through which the acoustic wave enters, and allows the acoustic wave having entered through the incidence surface to propagate therethrough, and the first support portion has an opening for the acoustic wave and supports the propagation medium portion so that the incidence surface is exposed through the opening; a light source configured to output a light wave so that the light wave passes through the propagation medium portion across the acoustic wave propagating through the propagation medium portion; a light-blocking portion having an edge line parallel to the incidence surface of the propagation medium portion for splitting the light wave having passed through the propagation medium portion into a blocked portion and a non-blocked portion; and a photoelectric conversion section configured to receive a portion of the light wave having passed through the propagation medium portion which has not been blocked by the light-blocking portion to output an electric signal, wherein: a +1 the photoelectric conversion section detects at least a portion of one of an area of a 0