Title:
MUTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/118636
Kind Code:
A1
Abstract:
In order to enable noises entering the ear from random directions to be muted without wearing headphones, this muting device is provided with: a super-directional microphone that detects noises in spot areas around the ear at pinpoints; and an ultrasonic speaker that modulates and outputs a carrier signal supplied by a transmitter according to noise signals detected by the super-directional microphone. Furthermore, an adaptive filter is provided, and the adaptive filter supplies noise signals with the opposite phase to noises detected by the super-direction microphone, and transmits an ultrasonic signal from the ultrasonic speaker toward the eardrum of a human.
Inventors:
SATO YASUSHI (JP)
Application Number:
PCT/JP2013/052223
Publication Date:
August 15, 2013
Filing Date:
January 31, 2013
Export Citation:
Assignee:
KYUSHU INST TECHNOLOGY (JP)
International Classes:
G10K11/178; H04R3/00
Foreign References:
| JP2005352255A | 2005-12-22 | |||
| JP2005159731A | 2005-06-16 | |||
| JP2007180922A | 2007-07-12 | |||
| JP2005352255A | 2005-12-22 |
Other References:
See also references of EP 2814026A4
Attorney, Agent or Firm:
Shin-yu International Patent Firm (JP)
Patent business corporation Nobutomo international patent firm (JP)
Patent business corporation Nobutomo international patent firm (JP)
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Claims: