JPS6474900A - Public address system - Google Patents
Public address systemInfo
- 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
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.
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)
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 |
-
1987
- 1987-09-17 JP JP62233454A patent/JPS6474900A/en active Pending
Cited By (1)
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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