JPS6474900A - Public address system - Google Patents

Public address system

Info

Publication number
JPS6474900A
JPS6474900A JP62233454A JP23345487A JPS6474900A JP S6474900 A JPS6474900 A JP S6474900A JP 62233454 A JP62233454 A JP 62233454A JP 23345487 A JP23345487 A JP 23345487A JP S6474900 A JPS6474900 A JP S6474900A
Authority
JP
Japan
Prior art keywords
detector
reproducing device
noise
reproducing
speaker
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
JP62233454A
Other languages
Japanese (ja)
Inventor
Toyonori Ishida
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP62233454A priority Critical patent/JPS6474900A/en
Publication of JPS6474900A publication Critical patent/JPS6474900A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To ease the hearing of announce contents without giving discomfort even when the noise of a high burst is generated by detecting of the noise level of an external part and controlling the reproducing, stopping and restarting of a sound from a recording medium based on this detected result. CONSTITUTION:A public address system is composed of a reproducing device 1 of an acoustic tape, etc., a noise detector 2, a loud speaker 3, an acoustic electric converter 4 and a speaker 5. The temporary stop and restarting of tape reproducing operation and the feeding back of acoustic data are executed by an instruction from the detector 2 with using the reproducing device 1. Namely, the external noise level to be inputted is calculated through the converter 4 by the detector 2 and according to this result, the above mentioned operation is generated in the reproducing device 1. The loud speaker 3 and the speaker 5 amplify the sound generated in the reproducing device 1 and release it toward the external part. In this constitution, the noise detector 2 is composed of a circuit to serially connect an A/D converter 21, a power calculator 22 and a sound source controller 23.
JP62233454A 1987-09-17 1987-09-17 Public address system Pending JPS6474900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62233454A JPS6474900A (en) 1987-09-17 1987-09-17 Public address system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62233454A JPS6474900A (en) 1987-09-17 1987-09-17 Public address system

Publications (1)

Publication Number Publication Date
JPS6474900A true JPS6474900A (en) 1989-03-20

Family

ID=16955289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62233454A Pending JPS6474900A (en) 1987-09-17 1987-09-17 Public address system

Country Status (1)

Country Link
JP (1) JPS6474900A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019091977A (en) * 2017-11-13 2019-06-13 クラリオン株式会社 Voice output system and voice output method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019091977A (en) * 2017-11-13 2019-06-13 クラリオン株式会社 Voice output system and voice output method

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