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Patent Searching and Data


Title:
SENSOR UNIT AND MUSICAL INSTRUMENT
Document Type and Number:
WIPO Patent Application WO/2017/056819
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a sensor unit capable of protecting a piezoelectric element and detecting sound together with vibration. A sensor unit according to the present invention is provided with a sheet-like piezoelectric element having a porous layer, and is further provided with a sound propagation sheet that covers at least one surface of the piezoelectric element and transmits sound incident on the one surface to the other surface. It is preferable for the sound pressure level difference between the sound incident on the sound propagation sheet and the transmitted sound to be 10 dB or less. It is preferable for the area density of the sound propagation sheet to be from 0.03-100 g/m2. It is preferable for the sound propagation sheet to be flexible. It is preferable for the sound propagation sheet to have voids. It preferable to further provide a sound blocking sheet that covers the other surface of the piezoelectric element and effectively prevents the transmission to the one surface of sound incident on the other surface.

Inventors:
MIYATA Tomoya (10-1 Nakazawa-cho, Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
HIYAMA Kunio (10-1 Nakazawa-cho, Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
IIDA Seiichiro (3 Kandasurugadai 4-chome, Chiyoda-k, Tokyo 62, 〒1010062, JP)
KOIKE Hiroshi (KASHIMA FACTORY 23, Touwada, Kamisu-sh, Ibaraki 02, 〒3140102, JP)
KODAMA Hidekazu (20-41 Higashi-Motomachi 3-chome, Kokubunji-sh, Tokyo 22, 〒1850022, JP)
Application Number:
JP2016/075244
Publication Date:
April 06, 2017
Filing Date:
August 29, 2016
Export Citation:
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Assignee:
YAMAHA CORPORATION (10-1, Nakazawa-cho Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
YUPO CORPORATION (3 Kandasurugadai 4-chome, Chiyoda-ku Tokyo, 62, 〒1010062, JP)
International Classes:
G01H11/08; G10H3/14; H01L41/053; H01L41/113; H01L41/193; H04R17/02
Domestic Patent References:
WO2014185526A12014-11-20
Foreign References:
JPH0650095U1994-07-08
JP2011216661A2011-10-27
JP2013249367A2013-12-12
Other References:
See also references of EP 3358319A4
Attorney, Agent or Firm:
AMANO Kazunori (6th Floor Fujikogyo-Nishimotomachi Building, 1-18, Aioi-cho 1-chome, Chuo-ku, Kobe-sh, Hyogo 25, 〒6500025, JP)
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