Title:
ノイズ消去イヤホン
Document Type and Number:
Japanese Patent JP2009516409
Kind Code:
A
Abstract:
An active noise cancellation earphone (1) has an acoustic path including a cavity (36) and a pipe (20) leading to the auditory canal (40) which are arranged to form an oscillator in use which has the effect of recovering the open loop system phase characteristics at a selected frequency or frequency range. The earphone (1) also has two parts (5,18) which can be adjusted relative to each other to allow the earphone (1) to be comfortably and correctly positioned in use.
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Inventors:
Donaldson, mark
Givernet, Damien Oliver
Givernet, Damien Oliver
Application Number:
JP2008539531A
Publication Date:
April 16, 2009
Filing Date:
November 13, 2006
Export Citation:
Assignee:
PHITEK SYSTEMS LIMITED
International Classes:
H04R1/10; G10K11/178
Domestic Patent References:
| JP2000059876A | 2000-02-25 | |||
| JPH09307983A | 1997-11-28 | |||
| JPH0879873A | 1996-03-22 | |||
| JPH0750892A | 1995-02-21 | |||
| JPH07154888A | 1995-06-16 | |||
| JPH03162099A | 1991-07-12 | |||
| JP2005277792A | 2005-10-06 | |||
| JP2000059876A | 2000-02-25 | |||
| JPH03505639A | 1991-12-05 |
Attorney, Agent or Firm:
Masatake Ide
Akira Nogami
Akira Nogami