JPS6422815U - - Google Patents
Info
- Publication number
- JPS6422815U JPS6422815U JP11531687U JP11531687U JPS6422815U JP S6422815 U JPS6422815 U JP S6422815U JP 11531687 U JP11531687 U JP 11531687U JP 11531687 U JP11531687 U JP 11531687U JP S6422815 U JPS6422815 U JP S6422815U
- Authority
- JP
- Japan
- Prior art keywords
- intake
- noise
- exhaust
- speaker
- exhaust pipe
- 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.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 2
Landscapes
- Exhaust Silencers (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
第１図は本考案実施例の排気管用アクテイブキ
ヤンセラーシステムを示す全体図、第２図は従来
例を示す全体図である。
１……排気管、３……圧電スピーカ、４……騒
音検出マイク、６……アクテイブキヤンセル制御
手段、７……エンジン、８……エラー検出マイク
、ａ……排気流路。
FIG. 1 is an overall view showing an active canceller system for an exhaust pipe according to an embodiment of the present invention, and FIG. 2 is an overall view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Exhaust pipe, 3... Piezoelectric speaker, 4... Noise detection microphone, 6... Active cancel control means, 7... Engine, 8... Error detection microphone, a... Exhaust flow path.
Claims (1)
もしくは排気の流路が形成された吸排気管と、該
吸排気管の騒音に対して圧力波を重ねることが可
能に設けられたキヤンセルスピーカと、前記吸排
気管系に設けられたマイクから入力した信号に基
き騒音を監視して所定の制御信号を前記キヤンセ
ルスピーカに出力するアクテイブキヤンセル制御
手段とを備え、前記吸排気管騒音の圧力波に対し
て騒音とは逆位相の粗密圧力波をキヤンセルスピ
ーカから出力して両圧力波の打ち消し作用により
消音を行なう吸排気管用アクテイブキヤンセラー
システムにおいて、 前記キヤンセルスピーカに、吸排気流路への露
出面がセラミツクまたは金属で形成された圧電ス
ピーカを用い、かつ、該圧電スピーカを、発振音
が吸排気流路側に集束される集束形状に形成した
ことを特徴とする吸排気管用アクテイブキヤンセ
ラーシステム。[Claims for Utility Model Registration] An intake/exhaust pipe whose one end is connected to the engine that is the source of noise, and in which an intake or exhaust flow path is formed, and which is provided so that pressure waves can be applied to the noise of the intake/exhaust pipe. and an active cancel control means that monitors noise based on a signal input from a microphone provided in the intake and exhaust pipe system and outputs a predetermined control signal to the cancel speaker, and controls the intake and exhaust pipe noise. In an active canceller system for intake/exhaust pipes, which outputs coarse pressure waves having a phase opposite to that of noise from a cancel speaker and muffles noise by canceling out both pressure waves, the cancel speaker is connected to the intake/exhaust flow path. 1. An active canceller system for intake and exhaust pipes, characterized in that a piezoelectric speaker whose exposed surface is made of ceramic or metal is used, and the piezoelectric speaker is formed into a converging shape so that oscillation sound is focused on the intake and exhaust flow path side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11531687U JPH0627785Y2 (en) | 1987-07-28 | 1987-07-28 | Active canceller system for intake and exhaust pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11531687U JPH0627785Y2 (en) | 1987-07-28 | 1987-07-28 | Active canceller system for intake and exhaust pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6422815U true JPS6422815U (en) | 1989-02-07 |
| JPH0627785Y2 JPH0627785Y2 (en) | 1994-07-27 |
Family
ID=31356866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11531687U Expired - Lifetime JPH0627785Y2 (en) | 1987-07-28 | 1987-07-28 | Active canceller system for intake and exhaust pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627785Y2 (en) |
-
1987
- 1987-07-28 JP JP11531687U patent/JPH0627785Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0627785Y2 (en) | 1994-07-27 |
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