Title:
SPEAKER FOR HELMET
Document Type and Number:
Japanese Patent JP2006042021
Kind Code:
A
Abstract:
To provide a compact and easily easy-to-handle speaker for a helmet by which sound can be heard even under a noisy environment.
A movable device 3 is oscillated by converting an electric signal obtained from a sound source into oscillation energy, the oscillation is conducted to a helmet structure and a sound wave is radiated from the structure. At the time, a signal amplifier 5 captures external sound, generates a signal reverse to the phase of the captured external sound to cancel the influence of the external sound, synthesizes the generated signal and sound obtained from the sound source, and outputs the synthesized sound to drive the movable device 3.
Inventors:
UEKUSA SUKENORI
SAITO TAKUMI
HIKOSAKA TOSHIHITO
YAMAMOTO SHUHEI
ISHIKAWA AKIRA
YOSHIMURA TOSHIYASU
SAITO TAKUMI
HIKOSAKA TOSHIHITO
YAMAMOTO SHUHEI
ISHIKAWA AKIRA
YOSHIMURA TOSHIYASU
Application Number:
JP2004220184A
Publication Date:
February 09, 2006
Filing Date:
July 28, 2004
Export Citation:
Assignee:
KOTOBUEERU KK
International Classes:
H04R1/20; A42B3/30; G10K11/178; H04R1/02; H04R11/02; H04R17/00
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
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