JPS54138423A - Fault detecting circuit of speaker circuit - Google Patents
Fault detecting circuit of speaker circuitInfo
- Publication number
- JPS54138423A JPS54138423A JP4518878A JP4518878A JPS54138423A JP S54138423 A JPS54138423 A JP S54138423A JP 4518878 A JP4518878 A JP 4518878A JP 4518878 A JP4518878 A JP 4518878A JP S54138423 A JPS54138423 A JP S54138423A
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- circuit
- direct
- current signal
- signal source
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
PURPOSE:To enable execution of checking of speaker circuit, by connecting a direct- current signal source to the line in a way to enable changeover with speaker amplifier. CONSTITUTION:A direct-current signal for detection of fault sent out from a direct- current signal source 7 flows in a second loop of direct-current signal source 7, 8, line 4, thransformer 3', alternating-current blocking circuit 11, signal generator 10, line 4, switching unit 8, and direct-current signal source 7. When there is a fault in the speaker circuit, the loop is not completed, and direct-current signal is not given to the signal generator 10, so that only the detection signal of the frequency alloted to the speaker 2 is not generated. A detector 6 judges to be nomral when the arriving detection signals are all frequencues allotted to each speaker 2, and, otherwise, judges that the circuit in the speaker 2 to which the frequeny is alloted is defective.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4518878A JPS54138423A (en) | 1978-04-19 | 1978-04-19 | Fault detecting circuit of speaker circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4518878A JPS54138423A (en) | 1978-04-19 | 1978-04-19 | Fault detecting circuit of speaker circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54138423A true JPS54138423A (en) | 1979-10-26 |
Family
ID=12712283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4518878A Pending JPS54138423A (en) | 1978-04-19 | 1978-04-19 | Fault detecting circuit of speaker circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54138423A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106998523A (en) * | 2017-04-24 | 2017-08-01 | 恒业世纪安全技术有限公司 | A kind of two line detects the circuit and detection means of the online quantity of loudspeaker in real time |
-
1978
- 1978-04-19 JP JP4518878A patent/JPS54138423A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106998523A (en) * | 2017-04-24 | 2017-08-01 | 恒业世纪安全技术有限公司 | A kind of two line detects the circuit and detection means of the online quantity of loudspeaker in real time |
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