JPS6421552U - - Google Patents
Info
- Publication number
- JPS6421552U JPS6421552U JP11538687U JP11538687U JPS6421552U JP S6421552 U JPS6421552 U JP S6421552U JP 11538687 U JP11538687 U JP 11538687U JP 11538687 U JP11538687 U JP 11538687U JP S6421552 U JPS6421552 U JP S6421552U
- Authority
- JP
- Japan
- Prior art keywords
- ambient noise
- noise level
- level detection
- microphone
- telephone
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11538687U JPS6421552U (zh) | 1987-07-28 | 1987-07-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11538687U JPS6421552U (zh) | 1987-07-28 | 1987-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6421552U true JPS6421552U (zh) | 1989-02-02 |
Family
ID=31356997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11538687U Pending JPS6421552U (zh) | 1987-07-28 | 1987-07-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6421552U (zh) |
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1987
- 1987-07-28 JP JP11538687U patent/JPS6421552U/ja active Pending