JPS648827U - - Google Patents
Info
- Publication number
- JPS648827U JPS648827U JP10423887U JP10423887U JPS648827U JP S648827 U JPS648827 U JP S648827U JP 10423887 U JP10423887 U JP 10423887U JP 10423887 U JP10423887 U JP 10423887U JP S648827 U JPS648827 U JP S648827U
- Authority
- JP
- Japan
- Prior art keywords
- telephone
- volume unit
- microphone
- circuit
- noise elimination
- 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
- 230000008030 elimination Effects 0.000 claims description 4
- 238000003379 elimination reaction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10423887U JPS648827U (enrdf_load_stackoverflow) | 1987-07-06 | 1987-07-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10423887U JPS648827U (enrdf_load_stackoverflow) | 1987-07-06 | 1987-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS648827U true JPS648827U (enrdf_load_stackoverflow) | 1989-01-18 |
Family
ID=31335779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10423887U Pending JPS648827U (enrdf_load_stackoverflow) | 1987-07-06 | 1987-07-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS648827U (enrdf_load_stackoverflow) |
-
1987
- 1987-07-06 JP JP10423887U patent/JPS648827U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR900015564A (ko) | 소음저감수화기장치 | |
| US4280018A (en) | Integrated piezoelectric sound transducer and preamplifier | |
| JP4559841B2 (ja) | ステレオマイクロホン | |
| JPS648827U (enrdf_load_stackoverflow) | ||
| US3970804A (en) | Electro-mechanical amplifier sound transducer | |
| US4022976A (en) | Mechanically-coupled microphone-speaker unit and intercom system | |
| US4636585A (en) | Telephone installations | |
| KR900007558Y1 (ko) | 헤드폰용 뮤트회로 | |
| US3176071A (en) | Electronic sound transmission | |
| JPH0646120Y2 (ja) | 音響測定装置 | |
| JPS58174737U (ja) | デ−タ入力装置 | |
| JPH0847077A (ja) | スピーカ駆動回路 | |
| JPS60155256U (ja) | 保留モニタ音受聴回路 | |
| KR850001048Y1 (ko) | 이어폰을 이용한 송수화장치 | |
| KR840002418B1 (ko) | 헤드폰 장치 | |
| JP2525481Y2 (ja) | 電話機 | |
| JPS5895411A (ja) | 小型音響機器 | |
| KR940002131B1 (ko) | 대화기능 및 송신기능을 갖는 리듬 발생장치 | |
| JPH026699Y2 (enrdf_load_stackoverflow) | ||
| JPH02177646A (ja) | 電話機における圧電送話器の無極性インピーダンス変換回路 | |
| JPS6093320U (ja) | 電力増幅回路 | |
| JPH0322439U (enrdf_load_stackoverflow) | ||
| JPS5826288U (ja) | 音響交換装置 | |
| JPS6256706B2 (enrdf_load_stackoverflow) | ||
| JPS6195153U (enrdf_load_stackoverflow) |