IT1071524B - SOUND REPRODUCER FOR VEHICLES PARTICULARLY CAR RADIO - Google Patents
SOUND REPRODUCER FOR VEHICLES PARTICULARLY CAR RADIOInfo
- Publication number
- IT1071524B IT1071524B IT6949076A IT6949076A IT1071524B IT 1071524 B IT1071524 B IT 1071524B IT 6949076 A IT6949076 A IT 6949076A IT 6949076 A IT6949076 A IT 6949076A IT 1071524 B IT1071524 B IT 1071524B
- Authority
- IT
- Italy
- Prior art keywords
- car radio
- sound reproducer
- particularly car
- vehicles particularly
- vehicles
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7532839A FR2394420A1 (en) | 1975-10-28 | 1975-10-28 | IMPROVEMENTS TO "AUTO-RADIO" RADIO RECEIVERS |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1071524B true IT1071524B (en) | 1985-04-10 |
Family
ID=9161700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT6949076A IT1071524B (en) | 1975-10-28 | 1976-10-15 | SOUND REPRODUCER FOR VEHICLES PARTICULARLY CAR RADIO |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE2646232A1 (en) |
ES (1) | ES452722A1 (en) |
FR (1) | FR2394420A1 (en) |
GB (1) | GB1561895A (en) |
IT (1) | IT1071524B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2731971B2 (en) * | 1977-07-15 | 1980-05-14 | Dieter 4300 Essen Eller | Method and device for controlling or regulating a useful sound source |
DE2752657A1 (en) * | 1977-11-25 | 1979-06-07 | Blaupunkt Werke Gmbh | Automatic volume control for car radios - selects narrow frequency band from useful signal and uses its level to control switch connecting microphone to store |
DE2903607C2 (en) * | 1979-01-31 | 1985-05-09 | Heymann, Andreas, 4300 Essen | Control device for volume control of radio reception or LF transmission devices depending on the level of background noise |
JPS55147015A (en) * | 1979-05-07 | 1980-11-15 | Hitachi Ltd | Audio unit mounting on car |
US4476571A (en) * | 1981-06-15 | 1984-10-09 | Pioneer Electronic Corporation | Automatic sound volume control device |
JPS583305A (en) * | 1981-06-29 | 1983-01-10 | Hitachi Ltd | Automatic sound volume adjusting circuit |
GB2124048A (en) * | 1982-05-13 | 1984-02-08 | Carfield | Volume control of electronic games |
DE3816918C1 (en) * | 1988-05-18 | 1989-07-27 | Adam Opel Ag, 6090 Ruesselsheim, De | |
GB2257317A (en) * | 1991-06-26 | 1993-01-06 | Damian Rupert Lindley | Automatic volume control for car stereo |
-
1975
- 1975-10-28 FR FR7532839A patent/FR2394420A1/en active Granted
-
1976
- 1976-10-13 DE DE19762646232 patent/DE2646232A1/en not_active Withdrawn
- 1976-10-14 GB GB4267776A patent/GB1561895A/en not_active Expired
- 1976-10-15 IT IT6949076A patent/IT1071524B/en active
- 1976-10-26 ES ES452722A patent/ES452722A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ES452722A1 (en) | 1977-10-01 |
FR2394420A1 (en) | 1979-01-12 |
GB1561895A (en) | 1980-03-05 |
FR2394420B1 (en) | 1980-01-04 |
DE2646232A1 (en) | 1977-05-05 |
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