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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/208397
Kind Code:
[Problem] To provide at low cost a noise-canceling headphone not requiring a complicated filter. [Solution] A noise-canceling headphone in which a microphone 16 for collecting external noise and a speaker 13 for emitting a sound toward an opening of an external auditory canal of a user are provided in a housing, a noise-canceling signal is generated from a noise signal collected by the microphone 16, the speaker 13 is driven by the noise-canceling signal, and a noise-canceling sound having an opposite phase to the external noise is emitted, wherein one microphone 16 is provided outside a back cavity 12d that is an acoustic space within the housing 12 and behind a diaphragm of the speaker 13, and a guide 19 for guiding the external noise to the microphone 16 is provided in the housing 12.

ASHIZAWA, Shinya (Limited 1-1-109, Tsutsujigaoka, Akishima-sh, Tokyo 50, 〒1968550, JP)
Application Number:
Publication Date:
December 07, 2017
Filing Date:
June 01, 2016
Export Citation:
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FOSTER ELECTRIC COMPANY, LIMTED (1-1-109, Tsutsujigaoka Akishima-sh, Tokyo 50, 〒1968550, JP)
International Classes:
H04R1/10; G10K11/178; H04R1/02; H04R3/00
Attorney, Agent or Firm:
IJIMA, Tohji (#104 Kunitachi Daikamplaza, 1-3-15 Higashi, Kuntachi-sh, Tokyo 02, 〒1860002, JP)
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