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JPS57194128A - Specific out-of-car signal information system - Google Patents

Specific out-of-car signal information system

Info

Publication number
JPS57194128A
JPS57194128A JP7921681A JP7921681A JPS57194128A JP S57194128 A JPS57194128 A JP S57194128A JP 7921681 A JP7921681 A JP 7921681A JP 7921681 A JP7921681 A JP 7921681A JP S57194128 A JPS57194128 A JP S57194128A
Authority
JP
Japan
Prior art keywords
signal
circuit
sound
car
amplifier 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
JP7921681A
Other languages
Japanese (ja)
Inventor
Tetsuo Sato
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7921681A priority Critical patent/JPS57194128A/en
Publication of JPS57194128A publication Critical patent/JPS57194128A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Traffic Control Systems (AREA)

Abstract

PURPOSE:In a method for detecting the specific signal sound for an ambulance, to perform the safe driving by comparing the out-of-car sound signal with the recorded referential signal then recognizing and informing the existence of the specific signal. CONSTITUTION:When the specific signal such as the siren of the ambulance is contained in the detection signal from a microphone 1, the digital signal of H is produced from the recognition circuit 4 to turn the switch circuit 8 to the side of the terminal 8b. Consequently the indicator circuit 6 is driven and the output signal from the car stereo 5 is not fed to the amplifier circuit 9, thus to interrupt the music from the speaker 7. At the same time the output from the amplifier circuit 3 is fed to the amplifier circuit 9 to sound the out-of-car sound as it is. Said recognition circuit 4 will compare the electrical data of the recorded referential signal with the out-of-car sound signal from the microphone 1 in the comparator circuit 4a to produce the signal.
JP7921681A 1981-05-27 1981-05-27 Specific out-of-car signal information system Pending JPS57194128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7921681A JPS57194128A (en) 1981-05-27 1981-05-27 Specific out-of-car signal information system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7921681A JPS57194128A (en) 1981-05-27 1981-05-27 Specific out-of-car signal information system

Publications (1)

Publication Number Publication Date
JPS57194128A true JPS57194128A (en) 1982-11-29

Family

ID=13683728

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7921681A Pending JPS57194128A (en) 1981-05-27 1981-05-27 Specific out-of-car signal information system

Country Status (1)

Country Link
JP (1) JPS57194128A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06325291A (en) * 1991-02-28 1994-11-25 Kenwood Corp Emergency vehicle detection alarm device and position display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06325291A (en) * 1991-02-28 1994-11-25 Kenwood Corp Emergency vehicle detection alarm device and position display device

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