Title:
ELECTROACOUSTIC TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2020/110755
Kind Code:
A1
Abstract:
The present invention makes it possible to effectively use sound waves emitted from both sides of a piezoelectric element used as a vibrating body in an electroacoustic transducer. Provided is an earphone 1A comprising a housing 10, a vibrating body 20 constituted by a piezoelectric element that is provided in the housing and has a porous membrane 22 and a pair of electrodes 24-1, 24-2 sandwiching the porous membrane, a partitioning wall 30 dividing the space inside the housing 10 into a first space 110-1 on the side of electrode 24-1 and a second space 110-2 on the side of electrode 24-2, a first tube 50-1 for causing a sound wave emission opening 60 that opens to the space outside the housing and the first space 110-1 to be in communication with each other, and a second tube 50-2 for causing the sound wave emission opening 60 and the second space 110-2 to be in communication with each other.
Inventors:
TSUCHIHASHI YU (JP)
MIYATA TOMOYA (JP)
MIYATA TOMOYA (JP)
Application Number:
PCT/JP2019/044724
Publication Date:
June 04, 2020
Filing Date:
November 14, 2019
Export Citation:
Assignee:
YAMAHA CORP (JP)
International Classes:
H04R1/02; H04R1/10; H04R1/28; H04R17/00
Domestic Patent References:
| WO2016204045A1 | 2016-12-22 | |||
| WO2017082665A1 | 2017-05-18 | |||
| WO2016067681A1 | 2016-05-06 |
Foreign References:
| US20050094843A1 | 2005-05-05 |
Attorney, Agent or Firm:
CHUBU PATENT OFFICE (JP)
Download PDF: