Title:
EAR PIECE
Document Type and Number:
Japanese Patent JPS6166499
Kind Code:
A
Abstract:
An earpiece comprises a suction cup sensor, a preamplifier, a potentiometer for varying the gain of the amplifier, a pass band filter and electronic means enabling the user to adjust the central frequency and/or width of the pass band of the filter. One application of the invention is the construction of self-contained and individualized telephone handsets or headphones which may be connected without any wire connection on any telephone set.
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| JPH05168266 | CONTROL CIRCUIT |
Inventors:
TEOFUIRU ANJIERIINI
JIYORUJIYU KANEBE
MARUKU FUOTEI
FURANSOWA SANTON
JIYORUJIYU KANEBE
MARUKU FUOTEI
FURANSOWA SANTON
Application Number:
JP19399885A
Publication Date:
April 05, 1986
Filing Date:
September 04, 1985
Export Citation:
Assignee:
CENTRE NAT RECH SCIENT
International Classes:
H03G5/00; H03H19/00; H04R3/00; H04M1/215; H04M1/60; H04R3/04; H04R25/00; (IPC1-7): H04R3/00; H04R3/04
Attorney, Agent or Firm:
Takehiko Suzue