Simultaneous two-way communication apparatus using ear microphone

• US 6,272,227 B1
• Filed: 09/24/1998
• Issued: 08/07/2001
• Est. Priority Date: 07/03/1996
• Status: Expired due to Fees

• Current Assignee: Temco Japan Co., Ltd.
• Original Assignee: Temco Japan Co., Ltd.
• Inventors: Yanagisawa, Hiroaki
• Primary Examiner(s): Harvey, Minsun Oh
• Application Number:
  US09/159,669
• Time in Patent Office: 1,048 Days
• Field of Search: 381/104, 381/74, 381/107, 381/123, 381/312, 381/325, 381/321, 381/91
• US Class Current: 381/104
• CPC Class Codes: H03G 3/3005 in amplifiers suitable for low-frequencies, e.g. audio amplifiers H03G3/32, H03G3/34 take precedence

Abstract

The apparatus eliminates howls to permit a received sound to increase in sound volume to enable the apparatus to be used in high-noise areas, and comprises: a transceived sound volume control circuit 10 for controlling in sound volume a transceived sound, the circuit 10 being interposed between: an ear microphone 1 containing a microphone 4 and a speaker 5; and, a communication system 20 such as PHS. The circuit 10 comprises: a communication switching means 16 for performing a switching operation in communications; high-frequency-signal cutting means 17, 19, which attenuate a received sound signal in a transmission mode and then cut a high-frequency component of the signal; and, a transmitted-sound-signal attenuating means 15 for attenuating a transmitted-sound signal in a reception mode. The apparatus comprises a means 14 for cutting energy in the vicinity of a resonance point of the microphone 4, and a means 12 for detecting energy in the vicinity of the first formant of a sound to prevent the switching operation from being initiated due to extraneous noises.

Claims

1. A simultaneous two-way communication apparatus using an ear microphone, comprising:

a transceived sound volume control circuit, which controls in sound volume a sound being transceived, and is interposed between;

an ear microphone containing both a microphone and a speaker unit; and

, a communication system such as a PHS communication system and like communication systems;

said transceived sound volume control circuit comprising;

a communication switching means for performing a switching operation in communications;

a high-frequency signal cutting means, which attenuates a received sound signal in a transmission mode and then cuts a high-frequency signal contained in said received sound signal thus attenuated; and

, a transmitted-sound-signal attenuating means for attenuating a transmitted-sound signal in a reception mode; and

wherein

said simultaneous two-way communication apparatus further comprises a means for detecting energy in the vicinity of the first formant of a sound in order to prevent said switching operation from being initiated due to extraneous noises and like extraneous factors.

2. A simultaneous two-way communication apparatus using an ear microphone, comprising:

a transceived sound volume control circuit, which controls in sound volume a sound being transceived, and is interposed between;

an ear microphone containing both a microphone and a speaker unit; and

, a communication system such as a PHS communication system and like communication systems;

said transceived sound volume control circuit comprising;

a communication switching means for performing a switching operation in communications;

a high-frequency signal cutting means, which attenuates a received sound signal in a transmission mode and then cuts a high-frequency signal contained in said received sound signal thus attenuated; and

, a transmitted-sound-signal attenuating means for attenuating a transmitted-sound signal in a reception mode; and

wherein

said simultaneous two-way communication apparatus further comprises a means for cutting energy in the vicinity of a resonance point of said microphone.

3. The simultaneous two-way communication apparatus using the ear microphone, as set forth in claim 2, wherein:

said simultaneous two-way communication apparatus still further comprises a means for detecting energy in the vicinity of the first formant of a sound in order to prevent said switching operation from being initiated due to extraneous noises and like extraneous factors.

4. The simultaneous two-way communication apparatus using the ear microphone, as set forth in claim 2, wherein:

said simultaneous two-way communication apparatus still further comprises a means for detecting energy in the vicinity of the first formant of a sound in order to prevent said switching operation from being initiated due to extraneous noises and like extraneous factors.