JPH0338916U - - Google Patents

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Publication number
JPH0338916U
JPH0338916U JP9794389U JP9794389U JPH0338916U JP H0338916 U JPH0338916 U JP H0338916U JP 9794389 U JP9794389 U JP 9794389U JP 9794389 U JP9794389 U JP 9794389U JP H0338916 U JPH0338916 U JP H0338916U
Authority
JP
Japan
Prior art keywords
frequency characteristic
audio signal
average level
detecting
characteristic changing
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
Application number
JP9794389U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP9794389U priority Critical patent/JPH0338916U/ja
Publication of JPH0338916U publication Critical patent/JPH0338916U/ja
Pending legal-status Critical Current

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Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本考案のマイクアンプ回路の一実施例
を示したブロツク図、第2図は第1図に示した適
応型ハイパスフイルタのフイルタ特性の変化例を
示した特性図である。 1……適応型ハイパスフイルタ、2,3,7…
…アンプ、4,8……検波器、5……比較器、6
……LPF、10……マイクロフオン。
FIG. 1 is a block diagram showing one embodiment of the microphone amplifier circuit of the present invention, and FIG. 2 is a characteristic diagram showing examples of changes in filter characteristics of the adaptive high-pass filter shown in FIG. 1...Adaptive high-pass filter, 2, 3, 7...
...Amplifier, 4, 8...Detector, 5...Comparator, 6
...LPF, 10... Microphone.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] マイクロフオンからの入力音声信号を増幅して
出力するマイクアンプ回路において、前記入力音
声信号の低域成分の減衰量又は高域成分の強調量
を複数種又は連続して設定し得る周波数特性変化
手段と、この周波数特性変化手段から出力された
音声信号の全帯域における平均レベルを検出する
検出手段と、この周波数特性変化手段から出力さ
れた音声信号の低域成分の平均レベルを検出する
雑音検出手段と、前記検出手段から出力される平
均レベルと前記雑音検出手段から出力される平均
レベルとを比較する比較手段と、この比較手段の
比較結果に基づいて前記周波数特性変化手段の周
波数特性を設定する制御手段とを具備したことを
特徴とするマイクアンプ回路。
In a microphone amplifier circuit that amplifies and outputs an input audio signal from a microphone, frequency characteristic changing means is capable of setting a plurality of types or a continuous amount of attenuation of a low frequency component or an amount of emphasis of a high frequency component of the input audio signal. , a detection means for detecting the average level in the entire band of the audio signal output from the frequency characteristic changing means, and a noise detection means for detecting the average level of the low frequency component of the audio signal output from the frequency characteristic changing means. and comparing means for comparing the average level output from the detecting means and the average level output from the noise detecting means, and setting the frequency characteristic of the frequency characteristic changing means based on the comparison result of the comparing means. A microphone amplifier circuit characterized by comprising a control means.
JP9794389U 1989-08-24 1989-08-24 Pending JPH0338916U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9794389U JPH0338916U (en) 1989-08-24 1989-08-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9794389U JPH0338916U (en) 1989-08-24 1989-08-24

Publications (1)

Publication Number Publication Date
JPH0338916U true JPH0338916U (en) 1991-04-15

Family

ID=31647062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9794389U Pending JPH0338916U (en) 1989-08-24 1989-08-24

Country Status (1)

Country Link
JP (1) JPH0338916U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101021970B1 (en) * 2010-07-12 2011-03-16 김성호 Tool box
JP2014187556A (en) * 2013-03-23 2014-10-02 Yamaha Corp Signal processor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101021970B1 (en) * 2010-07-12 2011-03-16 김성호 Tool box
JP2014187556A (en) * 2013-03-23 2014-10-02 Yamaha Corp Signal processor

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