JPS6441349A - Telephone system for automobile - Google Patents

Telephone system for automobile

Info

Publication number
JPS6441349A
JPS6441349A JP19717987A JP19717987A JPS6441349A JP S6441349 A JPS6441349 A JP S6441349A JP 19717987 A JP19717987 A JP 19717987A JP 19717987 A JP19717987 A JP 19717987A JP S6441349 A JPS6441349 A JP S6441349A
Authority
JP
Japan
Prior art keywords
frequency band
intensity level
flat
smoothing filter
voice frequency
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.)
Granted
Application number
JP19717987A
Other languages
Japanese (ja)
Other versions
JP2534270B2 (en
Inventor
Tadao Suzuki
Seiichirou Hiramatsu
Mitsugi Otsuka
Takuo Yamamoto
Yoshimi Shoji
Nobuyuki Ishihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
NipponDenso Co Ltd
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 by Toyota Motor Corp, NipponDenso Co Ltd filed Critical Toyota Motor Corp
Priority to JP62197179A priority Critical patent/JP2534270B2/en
Publication of JPS6441349A publication Critical patent/JPS6441349A/en
Application granted granted Critical
Publication of JP2534270B2 publication Critical patent/JP2534270B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To attain talking with high fidelity by using a smoothing filter so as to attenuate the intensity level at high voice frequency band and to make the intensity level at the high voice frequency band and the intensity level of low frequency band flat. CONSTITUTION:An amplifier 3 is connected to a microphone 1 and a smoothing filter 4 making the amplified transmission signal SGI flat is connected to the amplifier 3 and the signal SGI made flat by the smoothing filter 4 is sent from a radio equipment 5. That is, the intensity level of the high frequency band of transmission signal having a voice frequency characteristic where the intensity level at the low voice frequency band is attenuated largely and a peak appears in the intensity level at high frequency band is attenuated to make the intensity level at the high frequency band and the intensity level at low frequency band flat. Thus, the acoustic coupling is reduced and the talking with fidelity is improved.
JP62197179A 1987-08-06 1987-08-06 Car phone equipment Expired - Fee Related JP2534270B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62197179A JP2534270B2 (en) 1987-08-06 1987-08-06 Car phone equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62197179A JP2534270B2 (en) 1987-08-06 1987-08-06 Car phone equipment

Publications (2)

Publication Number Publication Date
JPS6441349A true JPS6441349A (en) 1989-02-13
JP2534270B2 JP2534270B2 (en) 1996-09-11

Family

ID=16370119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62197179A Expired - Fee Related JP2534270B2 (en) 1987-08-06 1987-08-06 Car phone equipment

Country Status (1)

Country Link
JP (1) JP2534270B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0489543A2 (en) * 1990-12-03 1992-06-10 AT&T Corp. Telephone network speech signal enhancement
JPH0819677A (en) * 1990-01-25 1996-01-23 Yamato Sewing Mach Seizo Kk Button sewing machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6229253A (en) * 1985-07-30 1987-02-07 Toshiba Corp Telephone set

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6229253A (en) * 1985-07-30 1987-02-07 Toshiba Corp Telephone set

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0819677A (en) * 1990-01-25 1996-01-23 Yamato Sewing Mach Seizo Kk Button sewing machine
EP0489543A2 (en) * 1990-12-03 1992-06-10 AT&T Corp. Telephone network speech signal enhancement
EP0489543A3 (en) * 1990-12-03 1994-03-23 American Telephone & Telegraph

Also Published As

Publication number Publication date
JP2534270B2 (en) 1996-09-11

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees