Title:
An electroacoustic transducer, its manufacturing method, and the electronic equipment using the electroacoustic transducer
Document Type and Number:
Japanese Patent JP6156387
Kind Code:
B2
Abstract:
The present invention contributes to transmitting a highly directional acoustic wave(s) with high efficiency. An electroacoustic transducer comprises a piezoelectric vibrator; a casing being provided with a predetermined space from the piezoelectric vibrator and including a frustum shape cutout in an inner wall thereof; and an acoustic absorption material being fitted in the cutout wherein a sound hole is formed in the casing in front of the piezoelectric vibrator in an oscillating direction of the piezoelectric vibrator; and the casing is formed in the casing such that a hole diameter of a sound path decreases toward a front end in the oscillating direction of the piezoelectric vibrator.
Inventors:
Yasuharu Onishi
Application Number:
JP2014542109A
Publication Date:
July 05, 2017
Filing Date:
October 11, 2013
Export Citation:
Assignee:
NEC
International Classes:
H04R1/34; H04R1/40; H04R17/00; H04R31/00
Domestic Patent References:
| JP2010074544A | ||||
| JP2004098234A1 | ||||
| JP2012100043A | ||||
| JP2007082052A |
Foreign References:
| WO2012131825A1 |
Attorney, Agent or Firm:
Kato Asamichi
Kiuchi Uchida
Mitsuru Aoki
Higuchi
Mikio Takahashi
Kiuchi Uchida
Mitsuru Aoki
Higuchi
Mikio Takahashi
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