JPS6441349A - Telephone system for automobile - Google Patents
Telephone system for automobileInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6229253A (en) * | 1985-07-30 | 1987-02-07 | Toshiba Corp | Telephone set |
-
1987
- 1987-08-06 JP JP62197179A patent/JP2534270B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6229253A (en) * | 1985-07-30 | 1987-02-07 | Toshiba Corp | Telephone set |
Cited By (3)
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 |