JPH0395349A - Electronic noise silencer - Google Patents
Electronic noise silencerInfo
- Publication number
- JPH0395349A JPH0395349A JP1232625A JP23262589A JPH0395349A JP H0395349 A JPH0395349 A JP H0395349A JP 1232625 A JP1232625 A JP 1232625A JP 23262589 A JP23262589 A JP 23262589A JP H0395349 A JPH0395349 A JP H0395349A
- Authority
- JP
- Japan
- Prior art keywords
- divided
- sound
- propagating
- frequency
- duct
- 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
- 230000003584 silencer Effects 0.000 title 1
- 230000001902 propagating effect Effects 0.000 claims abstract description 18
- 238000005192 partition Methods 0.000 claims abstract description 9
- 230000030279 gene silencing Effects 0.000 claims description 25
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 230000001743 silencing effect Effects 0.000 description 9
- 230000000644 propagated effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0263—Insulation for air ducts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17857—Geometric disposition, e.g. placement of microphones
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/101—One dimensional
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3214—Architectures, e.g. special constructional features or arrangements of features
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Duct Arrangements (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電子消音ンステムに係り、特に音波の伝ｌｌ！
ａ路を改善して高い消音効果を得るようにした電子消音
ンステムに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic sound deadening system, and more particularly to sound wave transmission systems.
This invention relates to an electronic muffling system that improves the a-way and obtains a high muffling effect.
従来、管路騒音に対する消音を管ｌＩ！による干渉や管
に内張リした多孔質材による吸音等の現象を利用して行
う受動型消音器は広く実用されているっしかし、このよ
うな受動型消音器は、消音器のサイズ、圧力損失等の点
でその改善に対する要求が多い。Conventionally, pipe lI! has been used to suppress pipe noise. Passive silencers are widely used, which utilize phenomena such as noise interference and sound absorption by porous materials lined with pipes. There are many requests for improvements in terms of losses and the like.
一方、これに対して管内騒音を消音するもう１つの方法
として、古くから提案されていた受動型消音器、即ち音
源から伝搬してきた騒音に対し、同一音圧、逆位相の付
加音を放射し、音波干渉によって消音効果を強制的に生
じさせる電子消音システムが着目されつつある。On the other hand, as another method for silencing pipe noise, a passive muffler has been proposed for a long time.In other words, it emits additional sound of the same sound pressure and opposite phase to the noise propagating from the sound source. Electronic silencing systems that forcibly produce a silencing effect through sound wave interference are attracting attention.
前記電子消音システムは電子デバイス、信号処理技術等
の急速な発達に伴って、最近様々な観点からの研究或果
が次々と発表されている。With the rapid development of electronic devices, signal processing technology, etc., research and results regarding the electronic silencing system from various viewpoints have recently been published one after another.
前記電子消音システムについて、本件出願人は既に特願
昭６１−７１１５ 号明細書等に於いて′Ｓ用化の為の
ンステム構戊を開示してきた。Regarding the above-mentioned electronic silencing system, the present applicant has already disclosed a system structure for application to 'S in the specification of Japanese Patent Application No. 7115/1983.
このような電子消音システムは、一次元音場の制御を前
提としているので、消音可能な周波数帯域は伝搬通路の
口径で決まる平面波伝搬周波数の隈界周波数以下の範囲
である。これについては、本件出願人が特開昭６２−１
６４４０１）号公報明細書に於いてすでに開示している
。しかし、伝搬通路の口径が大きくなるに従い、前述し
た限界周波数が低周彼数に移行するので、広帯域周波数
の消音効果を十分に得ることができない。Since such an electronic silencing system is based on the premise of controlling a one-dimensional sound field, the frequency band in which silencing is possible is the range below the corner frequency of the plane wave propagation frequency determined by the aperture of the propagation path. Regarding this, the applicant has
64401) has already been disclosed in the specification of the publication. However, as the diameter of the propagation path increases, the above-mentioned limit frequency shifts to a lower frequency, making it impossible to obtain a sufficient silencing effect for a wide band of frequencies.
この問題を解消する為に、第６図、第７図に示すように
、一次元音場を形或しない断面矩形状のダクト１０の伝
搬通路１２を仕切板１４、１６で一次元音波を形成する
断面矩形状の分割通路１２ａ，１２ａ・・・に形戊し、
この分割通路１２ａ，１２ａ・・・にセンサマイク１８
、１８・・・、スピーカ２０１２０・・・及びセンサマ
イク２２、２２・・・をそれぞれ取付けて消音効果を図
っている。In order to solve this problem, as shown in FIGS. 6 and 7, one-dimensional sound waves are formed in the propagation path 12 of the duct 10, which has a rectangular cross section and does not form a one-dimensional sound field, using partition plates 14 and 16. The divided passages 12a, 12a... have a rectangular cross section,
Sensor microphones 18 are placed in these divided passages 12a, 12a...
, 18 . . . , speakers 20120 . . . and sensor microphones 22, 22 .
しかしながら、断面矩形状の分割通路では、比咬的高゛
７）高周．Ｊ！数までしか移行することができな・７）
ので、広帯域周波数範囲で消音効果を十分に得ちれない
と５）う欠点がある。However, in a divided passage having a rectangular cross section, the relative height (7) high circumference. J! You can only move up to a number 7)
Therefore, there is a drawback that 5) a sufficient silencing effect cannot be obtained in a wide frequency range.
本発明はこのような事情に鑑みてなされたもので、広帯
域周波数範囲での消音効果を得ることができる電子消音
システムを提供することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic silencing system that can obtain a silencing effect over a wide frequency range.
本発明は、前記目的を達或する為に、音波の伝搬通路内
の伝搬音波をセンサマイクによって検出し、検出した伝
搬音波に基づいてスピーカかろ伝搬音彼の逆位泪で且つ
同一音圧の音波を発生させて音波干渉で伝搬音波の消音
を行う電子消音システムに於・、）て、前記伝搬通路（
２４）に放射状の仕切部材（２６、２８、３０〉を設け
て断面が略三角形の伝搬通路に分割し、該分割した伝ｌ
＃通路（２ ４ ａ）毎に前記センサマイク（３２、３
６）及びスピーカ （３４〉を設けたことを特徴とする
。In order to achieve the above object, the present invention detects the propagating sound waves in the sound wave propagation path with a sensor microphone, and based on the detected propagating sound waves, the speaker transmits the propagating sound at the opposite position and at the same sound pressure. In an electronic silencing system that generates a sound wave and uses sound wave interference to muffle the propagating sound wave, the propagation path (
24) is provided with radial partition members (26, 28, 30) to divide it into propagation paths with approximately triangular cross sections, and the divided propagation paths are
# The sensor microphone (32, 3
6) and a speaker (34).
〔作用：
本発明によれば、伝搬通路（２４）を、Ｉ２：搬放肘状
に分割して断面略三角形状の分割通路（２４ａ）を形或
したので、従来の断面矩形状の分割通路と比較し、平面
波伝Ｗｌ周波数の限界周波数を高周波数に移行すること
ができる。従って、広帯域閤波数範囲で消音効果を得る
ことができる，〔実施例〕
以下添付図面に従って本発明に係る電子消音システムの
好ましい実施例を詳説する。[Operation: According to the present invention, the propagation passage (24) is divided into I2: delivery elbow shapes to form the divided passage (24a) having a substantially triangular cross section, which is different from the conventional divided passage having a rectangular cross section. In comparison, the limit frequency of the plane wave transmission Wl frequency can be shifted to a higher frequency. Therefore, a silencing effect can be obtained over a wide frequency range. [Embodiment] Preferred embodiments of the electronic silencing system according to the present invention will be described in detail below with reference to the accompanying drawings.
第１図は本発明に係る電子消音システムの実施例を示す
要部斜視図が示されている。FIG. 1 is a perspective view of essential parts showing an embodiment of an electronic silencing system according to the present invention.
電子消音システム用ダク［０は、一般に亜鉛鉄板で断面
矩形状に構成され、図示しないファンから発せられる伝
搬音波が矢印八方向に伝搬している。また、ダクト２４
の口径は前記伝搬音波に対して一次元音場とならない口
径に形或されている。The electronic silencing system duct [0 is generally made of a galvanized iron plate and has a rectangular cross section, and propagating sound waves emitted from a fan (not shown) propagate in eight directions indicated by arrows. Also, the duct 24
The aperture is shaped so that it does not create a one-dimensional sound field for the propagating sound waves.
前記ダクト２４内に，は、仕切＋！Ｌ２６、２８、３０
が取付けられ、ダクト２４を対角線状に４分割している
。これによって、ダクト２４は第２図に示すように、■
次元音場が形或された断面三角形状の口径の分割ダクト
２４ａ、２４ａ・・・に分割される。Inside the duct 24, there is a partition+! L26, 28, 30
is attached to divide the duct 24 into four diagonally. As a result, the duct 24 becomes as shown in FIG.
The dimensional sound field is divided into divided ducts 24a, 24a, . . . each having a triangular diameter in cross section.
前記分割ダク｝２４ａ、２４ａ・・・内には、ニ１殼通
路の入口かち伝搬音彼の進行方向に向かってセ／サマイ
ク３２、スピーカ３４、センサマイク３６が分割−Ａ路
２４ａ，２４ａ・・・にそれぞれ取付けろれている。前
記スピーカ３４、３４・・・は、前記分割ダクト２４ａ
、２４ａ・・・の側面中央邪に設｝ナられ、その上部に
は図示しないコン１・ローラがそれぞれ設置されている
。Inside the divided ducts 24a, 24a..., a sensor microphone 32, a speaker 34, and a sensor microphone 36 are installed toward the entrance of the two shell passages and the propagated sound in the direction of travel. ... are installed on each side. The speakers 34, 34... are connected to the divided duct 24a.
, 24a, .
前記センサマイク３２、３２・・・は、前記スピーカ３
４、３４・・・を基準にして分割ダクト２４ａ、２４ａ
・・・に於ける伝搬音彼の上流側に設けられ、分割ダク
ト２４ａ，２４ａ・・・内に於｝ナるファンからの伝搬
音波を検出し、その検出信号を前記コントローラに送り
、スピーカ３４、３４・・・から前記伝搬音波と同一音
圧で逆位相の付加音を放射させる。また、センサマイク
３６、３６・・・は、前１己スピーカ３４、３４・・・
を基準にして分割ダクト２４ａ，２４ａ・・・に於ける
伝搬音波の下流側に設けられている。これによって、前
記センサマイク３６、３６・・・は分割ダク｝２４ａ、
２４ａを伝搬した伝搬音波の消音を確認し、消音されて
いない場合は、前記コントローラに検出信号を送り、ス
ピーカから＠記付加音を放射させる。The sensor microphones 32, 32... are connected to the speaker 3.
Divided ducts 24a, 24a based on 4, 34...
The propagated sound waves from the fans installed on the upstream side of the split ducts 24a, 24a... are detected, and the detection signal is sent to the controller, and the speaker 34 , 34... emit additional sound having the same sound pressure and opposite phase as the propagating sound wave. Further, the sensor microphones 36, 36... are connected to the front speakers 34, 34...
It is provided on the downstream side of the propagating sound waves in the divided ducts 24a, 24a, . As a result, the sensor microphones 36, 36, . . .
24a is confirmed, and if the sound wave propagated through 24a is not muted, a detection signal is sent to the controller to cause the speaker to emit an additional sound.
次に、前記の如＜ｍ戊された電子消音システムの作用に
ついて説明する。Next, the operation of the electronic silencing system as described above will be explained.
前述したように、電子消音ンステム用ダクト２４を仕切
坂２６、２８、３０によって断面三角形状の分割ダク｝
２４ａ、２４ａ・・・に形威したので、一次元音場を形
戊することができると共に、同じ断面蹟を有する従来の
断面矩形状の分割通路と比較し、平面波伝搬周波数の限
界周波数を高周Ｘｊ１数に移行することができる。As mentioned above, the electronic silencing system duct 24 is divided into a divided duct having a triangular cross section by the partition slopes 26, 28, and 30.
24a, 24a..., it is possible to shape a one-dimensional sound field, and the limit frequency of the plane wave propagation frequency is increased compared to the conventional divided passage with a rectangular cross section having the same cross section. It is possible to shift to the number of circumferences Xj1.
従って、本発明によれば広帯域周波数範囲の消音効果を
得ることができる。Therefore, according to the present invention, a silencing effect over a wide frequency range can be obtained.
第３図には本発明と従来の電子消音システムとの消音可
能な周波数範囲の比較を示す説明図が示されている。FIG. 3 is an explanatory diagram showing a comparison of the muffling frequency range between the present invention and a conventional electronic muffling system.
第３図によれば、本発明は従来の電子消音システムと比
較し、２倍以上の帯域周波数の周波数を消音することが
できる。また、従来の電子消音システムは、ダクトロ径
が大きくなるに従い消音可能な周波数範囲が狭くなるの
に対し、本発明に係る電子消音システムは、ダクトロ径
に影響されず前記周波数範囲を略一定に維持するこどが
できる。According to FIG. 3, the present invention can muffle frequencies in a band frequency that is more than twice that of the conventional electronic muffler system. In addition, in conventional electronic silencing systems, the range of frequencies that can be silenced becomes narrower as the duct diameter increases, whereas the electronic silencing system according to the present invention maintains the frequency range approximately constant without being affected by the duct diameter. I can have a child.
また、ダクト２４を第上図で示したように、対角線状に
分割することによって、それに使用されるスピーカ３４
の大きさは、（スピーカ３４の高さｈを一定にし、スピ
ーカの長さ２とすると）第６図で示した従来のスピーカ
２０よりも２倍の大きさで構或できる。In addition, by dividing the duct 24 diagonally as shown in the upper figure, the speaker 34 used therein can be divided into two parts.
can be twice as large as the conventional speaker 20 shown in FIG. 6 (assuming the height h of the speaker 34 is constant and the length of the speaker is 2).
従って、本発明に係る電子消音ンステムを使用すると、
スピーカボックスの容積は、従来の電子消音システムで
使用されるスピーカボックスの容積の２倍となるので、
従来のスピーカよりも低い周波数から付加音を発生する
ことができる。これによって、本発明は低い周波数の消
音効果を得ることができるので、更なる広帯域周波数の
消音効果を得ることができる。Therefore, when using the electronic sound deadening system according to the present invention,
The volume of the speaker box is twice that of the speaker box used in conventional electronic silencing systems, so
Additional sound can be generated from a lower frequency than conventional speakers. As a result, the present invention can obtain a low frequency silencing effect, and therefore can obtain a further broadband frequency silencing effect.
尚、本実施例ではダクト２４を対角線状に４分割すると
したが、これに限られるものではなく、第４図に示すよ
うにダクト３８の口径を仕切板４０で対角線状に２分割
し、分割ダクト３８ａ，３８ａを形或してもよｌ，）ａ
これによって、矩形状に２分割していた従来の分割ダク
トよりも広帯域周波数範囲で消音効果を得ることができ
る。In this embodiment, the duct 24 is diagonally divided into four parts, but the invention is not limited to this. As shown in FIG. The ducts 38a, 38a may be shaped
As a result, it is possible to obtain a noise reduction effect in a wider frequency range than in the conventional divided duct which is divided into two rectangular shapes.
また、第５図に示すように、ダクト４２の中心部４４を
基準にして仕切阪４６乃至６０を放射状に取付け、断面
三角形状の分割ダク｝４２ａ，４２ａ・・・を形或して
も第４図に示した分割ダクト３８ａと同様な効果を得る
ことができる。In addition, as shown in FIG. 5, the partitions 46 to 60 are installed radially with respect to the center 44 of the duct 42, and the divided ducts 42a, 42a, . The same effect as the divided duct 38a shown in FIG. 4 can be obtained.
また、第５図に示した実施例によれば、第８図で示す従
来の分割通路６２ａ，６２ａ・・・ ６３ａの分割では
その中央部の分割通路６３ａにスピーカが取付け難いの
に対し、ダクト４２の側面にスピーカを取付｝ナること
によって、分割通路４２ａ１４２ａ・・・全てにスピー
カを容易に取付けることができる。Furthermore, according to the embodiment shown in FIG. 5, it is difficult to attach a speaker to the central divided passage 63a in the conventional divided passages 62a, 62a, . . . , 63a shown in FIG. By attaching speakers to the sides of 42, speakers can be easily attached to all of the divided passages 42a, 142a, and so on.
尚、本実施例では、矩形状の伝搬通路の実施例について
説明したが、・これに限られるものでなく、断面円形の
ダクトにも適用することができる。In this embodiment, an example of a rectangular propagation path has been described, but the present invention is not limited to this, and can also be applied to a duct with a circular cross section.
二発明の効果〕
以上説明したように、本発明に係る電子消音ンステムに
よれば、分割通路を放射状に分割したので、高い広帯域
周波数範囲の消音効果を得ることができる。[Effects of the Second Invention] As described above, according to the electronic silencing system according to the present invention, since the dividing passage is divided radially, it is possible to obtain a silencing effect in a high broadband frequency range.
第１図は本発明に係る電子消音ンステムの実施例を示す
要部斜視図、第２図は第ｌ図におけるＡ−ＡＩに沿う断
面図、第３図は本発明に係る電子消音システムの消音可
能周波数範囲を示す説明図、第４図は本発明に係る電子
消音システムのダクト分割の第２実施例を示す断面図、
第５図は本発明に係る電子消音システムのダクト分割の
第３実施例を示す断面図、第６図は従来の電子消音シス
テムの実施例を示す要部斜視図、１７図は第６図に於：
ナるＢ−Ｂ線に沿う断面図、ｊｌ！８図は従来の電子消
音ンステムの分割通路の多分割状況を示す断面図である
。
板、
４・・・電子消音システム用ダクト、
ａ・・・分割ダクト、
２ ６、
２ ８、
３ ２、
６・・・センサマイク、
４ａｓ
０・・・仕切
４・・・スビ
一力。Fig. 1 is a perspective view of a main part showing an embodiment of an electronic silencing system according to the present invention, Fig. 2 is a sectional view taken along A-AI in Fig. 1, and Fig. 3 is a silencing system of an electronic silencing system according to the present invention. An explanatory diagram showing the possible frequency range; FIG. 4 is a sectional view showing a second embodiment of the duct division of the electronic silencing system according to the present invention;
FIG. 5 is a sectional view showing a third embodiment of the duct division of the electronic silencing system according to the present invention, FIG. 6 is a perspective view of the main part showing an embodiment of the conventional electronic silencing system, and FIG. in:
Cross-sectional view along line B-B, jl! FIG. 8 is a sectional view showing a multi-division state of the divided passage of the conventional electronic muffling system. Board, 4...Duct for electronic sound deadening system, a...Divided duct, 2 6, 2 8, 3 2, 6...Sensor microphone, 4as 0...Partition 4...Subiichiriki.
Claims (2)
って検出し、検出した伝搬音波に基づいてスピーカから
伝搬音波の逆位相で且つ同一音圧の音波を発生させて音
波干渉で伝搬音波の消音を行う電子消音システムに於い
て、 前記伝搬通路に放射状の仕切部材を設けて断面が略三角
形の伝搬通路に分割し、該分割した伝搬通路毎に前記セ
ンサマイク及びスピーカを設けたことを特徴とする電子
消音システム。(1) A sensor microphone detects the propagating sound waves in the sound wave propagation path, and based on the detected propagating sound waves, a speaker generates a sound wave with the opposite phase and the same sound pressure as the propagating sound waves, and the propagating sound waves are silenced by sound wave interference. The electronic silencing system is characterized in that a radial partition member is provided in the propagation path to divide it into propagation paths having a substantially triangular cross section, and the sensor microphone and speaker are provided for each divided propagation path. electronic sound deadening system.
伝搬通路を分割したことを特徴とする請求項（１）の電
子消音システム。(2) The electronic silencing system according to claim 1, wherein the propagation path is divided by providing a diagonal partition member in the propagation path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1232625A JPH0395349A (en) | 1989-09-07 | 1989-09-07 | Electronic noise silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1232625A JPH0395349A (en) | 1989-09-07 | 1989-09-07 | Electronic noise silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0395349A true JPH0395349A (en) | 1991-04-19 |
Family
ID=16942257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1232625A Pending JPH0395349A (en) | 1989-09-07 | 1989-09-07 | Electronic noise silencer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0395349A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0533916A1 (en) * | 1991-04-05 | 1993-03-31 | Applied Acoustic Research Inc. | Active noise control |
| FR2704969A1 (en) * | 1993-05-06 | 1994-11-10 | Centre Scient Tech Batiment | Active double wall acoustic attenuation device |
| US5627897A (en) * | 1994-11-03 | 1997-05-06 | Centre Scientifique Et Technique Du Batiment | Acoustic attenuation device with active double wall |
| JPH09160567A (en) * | 1995-12-05 | 1997-06-20 | Hitachi Plant Eng & Constr Co Ltd | Cell type electronic noise reduction system |
| NL1002491C2 (en) * | 1996-02-29 | 1997-09-01 | Ind En Handelmaatschappij Berg | Ventilation trunking |
| JP2008202209A (en) * | 2007-02-22 | 2008-09-04 | Eve's:Kk | Adhesive type brassiere with air permeability |
| JP2010256896A (en) * | 2009-03-31 | 2010-11-11 | Daikin Ind Ltd | Active silencing device and air blower using the same |
-
1989
- 1989-09-07 JP JP1232625A patent/JPH0395349A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0533916A1 (en) * | 1991-04-05 | 1993-03-31 | Applied Acoustic Research Inc. | Active noise control |
| EP0533916A4 (en) * | 1991-04-05 | 1994-06-15 | Applied Acoustic Res | Active noise control |
| FR2704969A1 (en) * | 1993-05-06 | 1994-11-10 | Centre Scient Tech Batiment | Active double wall acoustic attenuation device |
| WO1994027283A1 (en) * | 1993-05-06 | 1994-11-24 | Centre Scientifique Et Technique Du Batiment | Noise attenuation device with active double wall |
| US5724432A (en) * | 1993-05-06 | 1998-03-03 | Centre Scientifigue Et Technique Du Batiment | Acoustic attenuation device with active double wall |
| US5627897A (en) * | 1994-11-03 | 1997-05-06 | Centre Scientifique Et Technique Du Batiment | Acoustic attenuation device with active double wall |
| JPH09160567A (en) * | 1995-12-05 | 1997-06-20 | Hitachi Plant Eng & Constr Co Ltd | Cell type electronic noise reduction system |
| NL1002491C2 (en) * | 1996-02-29 | 1997-09-01 | Ind En Handelmaatschappij Berg | Ventilation trunking |
| JP2008202209A (en) * | 2007-02-22 | 2008-09-04 | Eve's:Kk | Adhesive type brassiere with air permeability |
| JP2010256896A (en) * | 2009-03-31 | 2010-11-11 | Daikin Ind Ltd | Active silencing device and air blower using the same |
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