JPS60124188U - Howling prevention device - Google Patents
Howling prevention deviceInfo
- Publication number
- JPS60124188U JPS60124188U JP911784U JP911784U JPS60124188U JP S60124188 U JPS60124188 U JP S60124188U JP 911784 U JP911784 U JP 911784U JP 911784 U JP911784 U JP 911784U JP S60124188 U JPS60124188 U JP S60124188U
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- control means
- gain
- output
- prevention device
- 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a、 bはハウジング防止の従来の方法を説明す
るためのブロック図、第2図は本考案の一実施例の構成
を示すブロック図である。
1・・・・・・マイクロホン、3・・・・・・増幅器、
4・・・・・・スピーカ、6・・・・・・SCフィルタ
、7・・・・・・電圧制御減衰器、8・・・・・・クロ
ックパルス発生器、9・・・・・・マイク増幅器、10
・・・・・・周波数カウンタ、11・・・・・・制御回
路。1A and 1B are block diagrams for explaining a conventional method of housing prevention, and FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. 1...Microphone, 3...Amplifier,
4...Speaker, 6...SC filter, 7...Voltage control attenuator, 8...Clock pulse generator, 9... Microphone amplifier, 10
...Frequency counter, 11...Control circuit.
Claims (1)
−るスピーカまでの信号ライン中に直列に挿入された可
変利得制御手段および1以上のスイッチドキャパシタフ
ィルタと、前記マイクロホンの出力または該マイクロホ
ンから独立してハウジング周波数検出のために設けられ
たマイクロホンの出力を増幅するマイク増幅器と、該マ
イク増幅器の出力信号周波数を計数する周波数カウンタ
と、前記スイッチドキャパシタフィルタにクロックパル
スを供給するクロックパルス発生器と、前記可変利得制
御手段の利得をハウジングを生ずる、 まで増大せ
しめ、ハウジング発生のときの前記周波数カウンタの計
数値に対応してスイッチドキャパンクフィルタによりハ
ウリング周波数帯域成分、の利得を減衰させるべきクロ
ックパルス周波数に前記クロックパルス発生器を制御す
る制御する制御手段とを備えてなることを特徴とするハ
ウリング防止装置。variable gain control means and one or more switched capacitor filters inserted in series in a signal line from a microphone to a loudspeaker driven by the output of the microphone; a microphone amplifier that amplifies the output of a microphone provided for detection; a frequency counter that counts the output signal frequency of the microphone amplifier; a clock pulse generator that supplies clock pulses to the switched capacitor filter; The gain of the gain control means is increased to generate housing, and the gain of the howling frequency band component is to be attenuated by a switched capacitive filter corresponding to the count value of the frequency counter at the time of housing generation. 1. A howling prevention device comprising: control means for controlling a clock pulse generator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP911784U JPS60124188U (en) | 1984-01-27 | 1984-01-27 | Howling prevention device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP911784U JPS60124188U (en) | 1984-01-27 | 1984-01-27 | Howling prevention device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60124188U true JPS60124188U (en) | 1985-08-21 |
Family
ID=30489029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP911784U Pending JPS60124188U (en) | 1984-01-27 | 1984-01-27 | Howling prevention device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60124188U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016050967A (en) * | 2014-08-28 | 2016-04-11 | 株式会社第一興商 | Karaoke device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5888997A (en) * | 1981-11-20 | 1983-05-27 | Matsushita Electric Ind Co Ltd | Microphone device |
-
1984
- 1984-01-27 JP JP911784U patent/JPS60124188U/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5888997A (en) * | 1981-11-20 | 1983-05-27 | Matsushita Electric Ind Co Ltd | Microphone device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016050967A (en) * | 2014-08-28 | 2016-04-11 | 株式会社第一興商 | Karaoke device |
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