Title:
HEARING AID
Document Type and Number:
Japanese Patent JP2004146926
Kind Code:
A
Abstract:
To provide a hearing aid capable of preventing the occurrence of howling by improving a howling margin without the need for a complicated configuration.
A bidirectivity microphone element 3a is configured to have a front directive sensing region 5f and a rear directive sensing region 5r at the outside of a skull 1 wherein the directivity sensitivity characteristic in a direction of an earphone 4 and an external auditory meatus is lower than that in other directions.
Inventors:
NAKATANI YOICHIRO
Application Number:
JP2002307097A
Publication Date:
May 20, 2004
Filing Date:
October 22, 2002
Export Citation:
Assignee:
VICTOR COMPANY OF JAPAN
International Classes:
H04R1/32; H04R3/00; H04R25/00; H04R25/02; (IPC1-7): H04R25/00; H04R1/32; H04R3/00; H04R25/02
Attorney, Agent or Firm:
Masataka Nihei
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