Title:
ACOUSTIC LENS AND SOUND COLLECTING DEVICE
Document Type and Number:
Japanese Patent JP2017147546
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve accuracy of picking up a target sound in an environment where noise exists in comparison with a directional microphone and a configuration in which signal processing is performed.SOLUTION: An acoustic lens (3) disposed between a microphone device (12) for converting sound into an electric signal and a sound source (2) includes: a plurality of openings (11) into which sound waves from the sound source (2) are introduced; and a plurality of waveguides (21) connecting between each opening (11) and the microphone device (12). Lengths of the waveguides (21) are set according to a distance from the sound source (2) to each opening (11) so that path lengths (L1+L4) of sound waves from the source (2) to the microphone device (12) coincides.SELECTED DRAWING: Figure 3
Inventors:
TAKAHASHI YOSHINORI
TANAKA JUN
TANAKA JUN
Application Number:
JP2016026942A
Publication Date:
August 24, 2017
Filing Date:
February 16, 2016
Export Citation:
Assignee:
UNIV TOKYO METROPOLITAN
SHANNON LAB CO LTD
SHANNON LAB CO LTD
International Classes:
H04R1/34
Domestic Patent References:
| JP2007201976A | 2007-08-09 | |||
| JP2005536113A | 2005-11-24 | |||
| JPH06105386A | 1994-04-15 | |||
| JPH11136787A | 1999-05-21 |
Attorney, Agent or Firm:
Kamei Takeyuki
Go Sasaki
Go Sasaki
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