Title:
OPTICAL MICROPHONE
Document Type and Number:
Japanese Patent JP2017092729
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an optical microphone capable of reducing distortion of an audio output signal.SOLUTION: An optical microphone 1 includes: a diaphragm 2 that vibrates upon reception of a sound wave; a light projecting side light guide that emits light from a light source toward the diaphragm; and a light receiving side light guide that receives reflected light from the diaphragm 2 and guides it to a light receiving element, The optical microphone outputs an audio signal from the light receiving element and is so configured that two pairs of light guide pairs 10, 20 consisting of a light projection side light guide and a light reception side light guide arranged in parallel across the diaphragm 2 and audio signals of the light receiving elements 13, 23 of the two pairs of light guide pairs 10, 20 are synthesized and output.SELECTED DRAWING: Figure 1
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Inventors:
AKINO YUTAKA
Application Number:
JP2015221258A
Publication Date:
May 25, 2017
Filing Date:
November 11, 2015
Export Citation:
Assignee:
AUDIO TECHNICA KK
International Classes:
H04R23/00
Attorney, Agent or Firm:
Yoshiyuki Ishibashi