JPH0338916U - - Google Patents
Info
- 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
Links
- 230000005236 sound signal Effects 0.000 claims 4
- 238000001514 detection method Methods 0.000 claims 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
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)
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.
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)
| 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 |
-
1989
- 1989-08-24 JP JP9794389U patent/JPH0338916U/ja active Pending
Cited By (2)
| 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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