JPS5640400A - Acoustic device for vehicle - Google Patents

Acoustic device for vehicle

Info

Publication number
JPS5640400A
JPS5640400A JP11590979A JP11590979A JPS5640400A JP S5640400 A JPS5640400 A JP S5640400A JP 11590979 A JP11590979 A JP 11590979A JP 11590979 A JP11590979 A JP 11590979A JP S5640400 A JPS5640400 A JP S5640400A
Authority
JP
Japan
Prior art keywords
car
circuit
sound outside
output
microphone
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
JP11590979A
Other languages
Japanese (ja)
Other versions
JPS5924015B2 (en
Inventor
Fuminori Hirose
Munenori Fujimoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11590979A priority Critical patent/JPS5924015B2/en
Publication of JPS5640400A publication Critical patent/JPS5640400A/en
Publication of JPS5924015B2 publication Critical patent/JPS5924015B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To detect easily the abnoramlly large noise outside the car to prevent accidents, by a constitution where the speaker inside the car emits automatically sound outside the car when sound outside the car becomes a prescribed level or more. CONSTITUTION:Sound outside the car room is detected by microphone 7, and turning-on and off of switch circuit 12 are controlled according to the output level of this microphone. The output of microphone 7 obtained through this switch circuit 12 is mixed with the output of acoustic circuits such as tape recorder 4 and radio receiving circuit 2 by mixing circuit 13. Only when sound outside the car room becomes a prescribed level or more, sound outside the car room is emitted from speaker 6 through amplifying circuit 5 connected to the output side of circuit 13.
JP11590979A 1979-09-10 1979-09-10 Automotive audio equipment Expired JPS5924015B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11590979A JPS5924015B2 (en) 1979-09-10 1979-09-10 Automotive audio equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11590979A JPS5924015B2 (en) 1979-09-10 1979-09-10 Automotive audio equipment

Publications (2)

Publication Number Publication Date
JPS5640400A true JPS5640400A (en) 1981-04-16
JPS5924015B2 JPS5924015B2 (en) 1984-06-06

Family

ID=14674203

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11590979A Expired JPS5924015B2 (en) 1979-09-10 1979-09-10 Automotive audio equipment

Country Status (1)

Country Link
JP (1) JPS5924015B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459702A (en) * 1988-07-01 1995-10-17 Greenspan; Myron Apparatus and method of improving the quality of recorded dictation in moving vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459702A (en) * 1988-07-01 1995-10-17 Greenspan; Myron Apparatus and method of improving the quality of recorded dictation in moving vehicles

Also Published As

Publication number Publication date
JPS5924015B2 (en) 1984-06-06

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