Title:
SOUND-ISOLATING EARPHONE HAVING COMMUNICATION PORTION
Document Type and Number:
WIPO Patent Application WO/2016/181431
Kind Code:
A1
Abstract:
[Problem] To achieve, when earphones are used, a frequency characteristic balanced in a broad band while making it easy to listen to sound from the earphones with external noise reduced and reducing sound leakage that may displease people therearound. [Solution] A sound guide tube is equipped with an ear tip, or a sound guide tube that fits the shape of an ear hole is used, thereby enhancing sound isolation. An internal space of a housing storing an electro-acoustic transducer and an external space are not acoustically communicated with each other. The internal space of the housing is sectioned into three spaces of a front space, an inner space, and a back space by the electro-acoustic transducer and an intermediate housing. The front space and the inner space are communicated with each other by a communication portion having a relatively small tubular space. The inner space and the back space are communicated with each other by a communication portion having a relatively small tubular space.
Inventors:
YAMAGISHI MAKOTO (JP)
Application Number:
PCT/JP2015/005519
Publication Date:
November 17, 2016
Filing Date:
November 04, 2015
Export Citation:
Assignee:
OCHARAKU CO LTD (JP)
International Classes:
H04R1/10
Foreign References:
| JP2014014074A | 2014-01-23 | |||
| JP2009284169A | 2009-12-03 |
Attorney, Agent or Firm:
KATO, TAKAO (JP)
Takao Kato (JP)
Takao Kato (JP)
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