JPS6233787B2 - - Google Patents
Info
- Publication number
- JPS6233787B2 JPS6233787B2 JP56073225A JP7322581A JPS6233787B2 JP S6233787 B2 JPS6233787 B2 JP S6233787B2 JP 56073225 A JP56073225 A JP 56073225A JP 7322581 A JP7322581 A JP 7322581A JP S6233787 B2 JPS6233787 B2 JP S6233787B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- microphone
- audio
- 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.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005236 sound signal Effects 0.000 claims description 7
- 238000009499 grossing Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 9
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56073225A JPS57188169A (en) | 1981-05-14 | 1981-05-14 | Audio switch device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56073225A JPS57188169A (en) | 1981-05-14 | 1981-05-14 | Audio switch device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57188169A JPS57188169A (en) | 1982-11-19 |
JPS6233787B2 true JPS6233787B2 (es) | 1987-07-22 |
Family
ID=13512018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56073225A Granted JPS57188169A (en) | 1981-05-14 | 1981-05-14 | Audio switch device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57188169A (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3579210A1 (en) | 2018-06-05 | 2019-12-11 | Kazuto Nakamura | Security system |
-
1981
- 1981-05-14 JP JP56073225A patent/JPS57188169A/ja active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3579210A1 (en) | 2018-06-05 | 2019-12-11 | Kazuto Nakamura | Security system |
Also Published As
Publication number | Publication date |
---|---|
JPS57188169A (en) | 1982-11-19 |
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