JPH02147993U - - Google Patents

Info

Publication number
JPH02147993U
JPH02147993U JP5573589U JP5573589U JPH02147993U JP H02147993 U JPH02147993 U JP H02147993U JP 5573589 U JP5573589 U JP 5573589U JP 5573589 U JP5573589 U JP 5573589U JP H02147993 U JPH02147993 U JP H02147993U
Authority
JP
Japan
Prior art keywords
microphone
noise
differential amplifier
speech
prevention circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5573589U
Other languages
English (en)
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP5573589U priority Critical patent/JPH02147993U/ja
Publication of JPH02147993U publication Critical patent/JPH02147993U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Telephone Set Structure (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)
JP5573589U 1989-05-17 1989-05-17 Pending JPH02147993U (US06330241-20011211-M00004.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5573589U JPH02147993U (US06330241-20011211-M00004.png) 1989-05-17 1989-05-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5573589U JPH02147993U (US06330241-20011211-M00004.png) 1989-05-17 1989-05-17

Publications (1)

Publication Number Publication Date
JPH02147993U true JPH02147993U (US06330241-20011211-M00004.png) 1990-12-17

Family

ID=31578947

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5573589U Pending JPH02147993U (US06330241-20011211-M00004.png) 1989-05-17 1989-05-17

Country Status (1)

Country Link
JP (1) JPH02147993U (US06330241-20011211-M00004.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0543649U (ja) * 1991-11-11 1993-06-11 ソニー株式会社 電話機
JPH06205092A (ja) * 1992-09-30 1994-07-22 American Teleph & Telegr Co <Att> ノイズ消去電話受話器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0543649U (ja) * 1991-11-11 1993-06-11 ソニー株式会社 電話機
JPH06205092A (ja) * 1992-09-30 1994-07-22 American Teleph & Telegr Co <Att> ノイズ消去電話受話器

Similar Documents

Publication Publication Date Title
US4819263A (en) Apparatus and method for hands free telephonic communication
JPH02147993U (US06330241-20011211-M00004.png)
JP2501445B2 (ja) 拡声通話回路
CA1288187C (en) Apparatus and method for hands free telephonic communication
JPH033021Y2 (US06330241-20011211-M00004.png)
JPS6142164U (ja) プレスト−ク・インタ−ホン装置
JPH079473Y2 (ja) 防騒音型コードレス子機電話機
JPS625740U (US06330241-20011211-M00004.png)
JPS6145638A (ja) 携帯型無線機
JPS61166649U (US06330241-20011211-M00004.png)
JPS6010954A (ja) 電話機
JPS6385988U (US06330241-20011211-M00004.png)
JPH0464848U (US06330241-20011211-M00004.png)
JPH0193863U (US06330241-20011211-M00004.png)
JPS61195057A (ja) 通話装置
JPS6437162U (US06330241-20011211-M00004.png)
JPH0221847U (US06330241-20011211-M00004.png)
JPS6072056U (ja) 電話機
JPS62188850U (US06330241-20011211-M00004.png)
JPH0279647U (US06330241-20011211-M00004.png)
JPH01139657U (US06330241-20011211-M00004.png)
JPH02106744U (US06330241-20011211-M00004.png)
JPH0450949U (US06330241-20011211-M00004.png)
JPH02252399A (ja) 可聴信号聴取装置
JPH0480158U (US06330241-20011211-M00004.png)