JPS59142995U - Howling prevention circuit - Google Patents
Howling prevention circuitInfo
- Publication number
- JPS59142995U JPS59142995U JP3702883U JP3702883U JPS59142995U JP S59142995 U JPS59142995 U JP S59142995U JP 3702883 U JP3702883 U JP 3702883U JP 3702883 U JP3702883 U JP 3702883U JP S59142995 U JPS59142995 U JP S59142995U
- Authority
- JP
- Japan
- Prior art keywords
- sound
- circuit
- peak value
- prevention circuit
- microphone
- 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
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はパイノーラルヘッドホンの一例ノ斜視図、第２
図は本考案になるハウリング防止回路の一実施例の回路
構成図である。
１、 ２・・・マイクロホン、３．４・・・ヘッドホン
エレメント、５・・・入力端子、６・・・プリアンプ、
９〜１１・・・オペアンプ（演算増幅器）、１２・・・
電源端子、１３・・・ヘッドホンアンプ、１４・・・出
力端子、 Ｃ１，Ｃ２・・・コンデンサ、Ｄ□・・
・ダイオード、Ｒ１−Ｒ１３・・・抵抗、ＶＲ，、ＶＲ
２・・・可変抵抗、Ｑ□、 Ｑ２・・・トランジスタ、
ｓｗ・・・スイッチ。Figure 1 is a perspective view of an example of pinaural headphones, Figure 2 is a perspective view of an example of pinaural headphones.
The figure is a circuit configuration diagram of an embodiment of the howling prevention circuit according to the present invention. 1, 2...Microphone, 3.4...Headphone element, 5...Input terminal, 6...Preamplifier,
9-11... operational amplifier (operational amplifier), 12...
Power terminal, 13... Headphone amplifier, 14... Output terminal, C1, C2... Capacitor, D□...
・Diode, R1-R13...Resistance, VR,, VR
2...Variable resistor, Q□, Q2...Transistor,
sw...switch.
Claims (1)
で増幅し該マイクロホンと同一音響空間内にある発音器
によりモニタ音を発生するモニタ装置に設けられ、該音
声信号のピーク値を検出して保持するピーク検出回路と
、該ピーク値を夫々毎に異なる基準値と比較して該ピー
ク値が夫々の基準値を越えたとき減衰制御信号を発生す
る複数の比較回路と、該複数の比較回路よりの減衰制御
信号に応じて該音声信号を減衰した後該増幅回路に供給
し該モニタ音のレベルをハウリングを起こさないレベル
に抑制する減衰回路とよりなるハウリング防止回路。Provided in a monitor device that amplifies the sound signal obtained by picking up the sound with a microphone using an amplifier circuit and generates a monitor sound using a sound generator located in the same acoustic space as the microphone, and detects and holds the peak value of the sound signal. a peak detection circuit that compares the peak value with a different reference value, and generates an attenuation control signal when the peak value exceeds each reference value; A howling prevention circuit comprising an attenuation circuit that attenuates the audio signal according to an attenuation control signal of the attenuator and then supplies it to the amplifier circuit to suppress the level of the monitored sound to a level that does not cause howling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3702883U JPS59142995U (en) | 1983-03-15 | 1983-03-15 | Howling prevention circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3702883U JPS59142995U (en) | 1983-03-15 | 1983-03-15 | Howling prevention circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59142995U true JPS59142995U (en) | 1984-09-25 |
Family
ID=30167688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3702883U Pending JPS59142995U (en) | 1983-03-15 | 1983-03-15 | Howling prevention circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59142995U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012205086A (en) * | 2011-03-25 | 2012-10-22 | Olympus Imaging Corp | Audio recording/reproducing apparatus |
-
1983
- 1983-03-15 JP JP3702883U patent/JPS59142995U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012205086A (en) * | 2011-03-25 | 2012-10-22 | Olympus Imaging Corp | Audio recording/reproducing apparatus |
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