JPH0410491U - - Google Patents
Info
- Publication number
- JPH0410491U JPH0410491U JP5093290U JP5093290U JPH0410491U JP H0410491 U JPH0410491 U JP H0410491U JP 5093290 U JP5093290 U JP 5093290U JP 5093290 U JP5093290 U JP 5093290U JP H0410491 U JPH0410491 U JP H0410491U
- Authority
- JP
- Japan
- Prior art keywords
- sound
- air passage
- noise
- additional sound
- propagating
- 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
- 230000030279 gene silencing Effects 0.000 claims description 4
- 230000001902 propagating effect Effects 0.000 claims 4
- 238000007664 blowing Methods 0.000 claims 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000011491 glass wool Substances 0.000 description 1
Description
第１図は本考案に係る電子消音システムの実施
例を示す説明図、第２図は従来の電子消音システ
ムの実施例を示す説明図、第３図は従来の電子消
音システムのセサーマイク及びエラーマイクから
発生する風切り音と送風路の騒音とを実験により
比較した説明図である。
１０……ダクト、１２……送風路、１４……セ
ンサーマイク、１６……エラーマイク、１８……
スピーカ、２０……グラスウール、２６……コン
トローラ。
Fig. 1 is an explanatory diagram showing an embodiment of an electronic silencing system according to the present invention, Fig. 2 is an explanatory diagram showing an embodiment of a conventional electronic silencing system, and Fig. 3 is a sensor microphone and an error microphone of a conventional electronic silencing system. FIG. 2 is an explanatory diagram comparing the wind noise generated from the air flow path and the noise of the air passage through an experiment. 10... Duct, 12... Air duct, 14... Sensor microphone, 16... Error microphone, 18...
Speaker, 20...Glass wool, 26...Controller.
Claims (1)
音源からの騒音の情報を検知するセンサマイクと
、送風路に設けられ、送風路を伝搬する前記騒音
を打ち消すための付加音を発生する付加音発生手
段と、送風路の壁面に設けられ、前記送風路を伝
搬する騒音と前記付加音との干渉音を検知するエ
ラーマイクと、前記センサマイク及びエラーマイ
クからの信号に基づいて、前記送風路を伝搬する
騒音に対して逆位相で且つ同一音圧の付加音を前
記付加音発生手段から発生させるための駆動信号
を作成する制御手段と、から成る電子消音システ
ムに於いて、 前記センサマイクとエラーマイクの集音面を多
孔質材で被覆し、風が集音面に直接衝突しないよ
うにしたことを特徴とする電子消音システム。[Claims for Utility Model Registration] A sensor microphone installed on the wall of the air passage to detect noise information from a noise source propagating through the air passage; and a sensor microphone installed on the air passage to cancel out the noise propagating through the air passage. additional sound generating means for generating additional sound for the purpose of the present invention; an error microphone provided on the wall of the air blowing path to detect interference sound between the noise propagating in the air blowing path and the additional sound; control means for creating a drive signal for causing the additional sound generating means to generate an additional sound having an opposite phase and the same sound pressure with respect to the noise propagating through the air passage, based on the signal; An electronic silencing system characterized in that the sound collecting surfaces of the sensor microphone and error microphone are covered with a porous material to prevent wind from directly colliding with the sound collecting surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5093290U JPH0410491U (en) | 1990-05-16 | 1990-05-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5093290U JPH0410491U (en) | 1990-05-16 | 1990-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0410491U true JPH0410491U (en) | 1992-01-29 |
Family
ID=31569913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5093290U Pending JPH0410491U (en) | 1990-05-16 | 1990-05-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0410491U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62164400A (en) * | 1986-01-14 | 1987-07-21 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencer system |
-
1990
- 1990-05-16 JP JP5093290U patent/JPH0410491U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62164400A (en) * | 1986-01-14 | 1987-07-21 | Hitachi Plant Eng & Constr Co Ltd | Electronic silencer system |
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