JPH07114390A - Active control type sound insulating device - Google Patents
Active control type sound insulating deviceInfo
- Publication number
- JPH07114390A JPH07114390A JP5262298A JP26229893A JPH07114390A JP H07114390 A JPH07114390 A JP H07114390A JP 5262298 A JP5262298 A JP 5262298A JP 26229893 A JP26229893 A JP 26229893A JP H07114390 A JPH07114390 A JP H07114390A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- sound source
- signal
- insulation wall
- sound insulation
- 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
Landscapes
- Building Environments (AREA)
- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は能動制御形遮音装置に関
するものであり、特に、変電所等から放射される騒音に
対する遮音装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active control type sound insulation device, and more particularly to a sound insulation device for noise emitted from a substation or the like.
【０００２】[0002]
【従来の技術】従来、音源から伝播する音を遮断する方
法としては、例えば遮音壁を設けることが知られてい
る。然し、遮音壁によって大なる減衰量を得るために
は、該遮音壁を高く構築しなければならない。然るとき
は、遮音壁の構築コストが増大するのみならず、景観を
損うとともに倒壊する危険性も高い。2. Description of the Related Art Conventionally, as a method of blocking the sound propagating from a sound source, for example, providing a sound insulating wall is known. However, in order to obtain a large amount of attenuation by the sound insulation wall, the sound insulation wall must be constructed high. In that case, not only will the cost of constructing the sound insulation wall increase, but there is a high risk of damaging the landscape and collapsing it.
【０００３】そこで、本願出願人は遮音壁を用いた消音
装置として、特願平４−８５６７６号発明及び特願平４
−３３０１２１号発明を提案している。Therefore, the applicant of the present invention has proposed the invention of Japanese Patent Application No. 4-85676 and Japanese Patent Application No. 4-8676 as a sound deadening device using a sound insulation wall.
-330121 invention is proposed.
【０００４】[0004]
【発明が解決しようとする課題】特願平４−８５６７６
号発明に於いては、空間層の底部に設置した複数の騒音
キャンセル用スピーカから放射される音が相互に干渉す
るため、騒音の消音効果が低下する。また、特願平４−
３３０１２１号発明に於いては、空間層を所定間隔にて
仕切ることにより、騒音キャンセル用スピーカから放射
される音の干渉を防止している。然し、騒音の音量、周
波数スペクトル、位相等は音源から遮音壁上端部に伝播
されるまでに変化するため、騒音キャンセル用スピーカ
から出力する音波の修正に時間が掛かるとともに、マイ
クロホンの位置によって消音効果が大きく変化する。[Patent Document 1] Japanese Patent Application No. 4-85676
In the invention, since the sounds emitted from the plurality of noise canceling speakers installed at the bottom of the space layer interfere with each other, the noise silencing effect is reduced. Also, Japanese Patent Application No. 4-
In the invention of No. 330121, the interference of the sound radiated from the noise canceling speaker is prevented by partitioning the space layer at a predetermined interval. However, since the volume, frequency spectrum, phase, etc. of noise change until it propagates from the sound source to the upper end of the sound insulation wall, it takes time to correct the sound wave output from the noise canceling speaker, and the muffling effect depends on the position of the microphone. It changes a lot.
【０００５】そこで、音源の音量や位相等を正確に把握
し、騒音を効率よく減衰できるようにするために解決す
べき技術的課題が生じてくるのであり、本発明はこの課
題を解決することを目的とする。Therefore, there arises a technical problem to be solved in order to accurately grasp the volume and phase of the sound source and to effectively attenuate the noise, and the present invention solves this problem. With the goal.
【０００６】[0006]
【課題を解決するための手段】本発明は上記目的を解決
するために提案されたものであり、２枚の遮音板を対峙
して立設するとともに遮音板間を垂直方向に所定間隔で
仕切り、上部が開放された空間層個室を連設してダクト
形遮音壁を形成し、該ダクト形遮音壁にて音源側と受音
側とを離隔し、前記夫々の空間層個室の底部に音源装置
を設置するとともに、夫々の空間層個室の上部であっ
て、受音側の遮音板の上端且つ受音側にエラーマイクロ
ホンを設置し、更に、音源若しくは音源近傍に信号検出
手段を設け、該信号検出手段にて検出した音源信号の位
相を反転するとともに、前記エラーマイクロホンの検出
信号に基づき該反転された信号を補正して前記音源装置
へ出力する手段とを設けたことを特徴とする能動制御形
遮音装置を提供するものである。SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems, and two sound insulating plates are erected so as to face each other, and the sound insulating plates are vertically partitioned at predetermined intervals. , A space layer private room having an open upper part is connected to form a duct type sound insulation wall, the sound source side and the sound receiving side are separated by the duct type sound insulation wall, and a sound source device is provided at the bottom of each space layer private room. In addition to the installation, an error microphone is installed at the upper end of the sound receiving side sound insulation plate and at the sound receiving side at the upper part of each space layer private room, and further, a signal detecting means is provided at or near the sound source to detect the signal. Means for inverting the phase of the sound source signal detected by the means, correcting the inverted signal based on the detection signal of the error microphone, and outputting the corrected signal to the sound source device. Provide sound insulation device Than it is.
【０００７】[0007]
【作用】音源から放射される騒音は信号検出手段によっ
て検出され、検出された音源信号は位相を反転した後
に、空間層個室の底部に設置した音源装置からダクト形
遮音壁の上部へ放射される。前記音源から伝播される騒
音は、ダクト形遮音壁の上部近傍にて、音源装置から放
射された逆位相の音波と相互に干渉し合って殆ど消音さ
れる。The noise emitted from the sound source is detected by the signal detecting means, and the detected sound source signal is inverted in phase and then emitted from the sound source device installed at the bottom of the space layer private room to the upper part of the duct type sound insulation wall. The noise propagated from the sound source is almost silenced in the vicinity of the upper part of the duct type sound insulation wall by mutually interfering with the sound waves of the opposite phase radiated from the sound source device.
【０００８】そして、エラーマイクロホンの検出信号に
基づいて騒音の減衰状態を監視し、位相反転した音源信
号の音量、周波数スペクトル等を補正して音源装置へ出
力する。Then, the noise attenuation state is monitored based on the detection signal of the error microphone, and the volume and frequency spectrum of the phase-inverted sound source signal are corrected and output to the sound source device.
【０００９】[0009]
【実施例】以下、本発明の一実施例を図面に従って詳述
する。図１及び図２に於いて、２枚の遮音板１１及び１
２を対峙して立設し、夫々の遮音板１１，１２を遮音性
能を有する仕切板１３，１３…にて垂直方向に所定間隔
で仕切り、上部が開放された空間層個室１４，１４…を
連設してダクト形遮音壁１５を形成する。ここで、例え
ば変電所等から放射される騒音の音源を１６とすれば、
この音源１６側と一般居住地区である受音側１７とを該
ダクト形遮音壁１５にて離隔する。An embodiment of the present invention will be described in detail below with reference to the drawings. In FIGS. 1 and 2, two sound insulating plates 11 and 1 are used.
2 facing each other and partitioning the respective sound insulating plates 11 and 12 by partition plates 13, 13 having a sound insulating property in the vertical direction at predetermined intervals to form space layer private chambers 14, 14 ... The duct type sound insulation wall 15 is formed by connecting them in series. Here, for example, if the sound source of noise radiated from a substation is 16,
The sound source 16 side and the sound receiving side 17 which is a general residential area are separated by the duct type sound insulation wall 15.
【００１０】而して、該ダクト形遮音壁１５の空間層個
室１４，１４…の底部に夫々スピーカ１８，１８…を設
置し、後述するように空間層個室１４，１４…内へ前記
音源１６の音波とは逆位相の音波を放射するように形成
する。また、該空間層個室１４，１４…の上部であっ
て、前記受音側１７の遮音板１２の上端且つ受音側１７
に、夫々エラーマイクロホン１９，１９…を設置する。
更に、前記音源１６の近傍であって、且つ、該音源１６
とダクト形遮音壁１５の上端を結ぶ線２０上に、マイク
ロホン２１等の信号検出手段を設ける。尚、信号検出手
段としては、マイクロホン２１のみに限定されるべきで
はなく、例えば振動ピックアップを音源１６に止着して
音源信号を検出してもよい。Speakers 18, 18 ... Are installed at the bottoms of the space layer private rooms 14, 14 of the duct type sound insulation wall 15, respectively, and the sound source 16 is introduced into the space layer private rooms 14, 14 ... It is formed so as to emit a sound wave having a phase opposite to that of the sound wave. Further, at the upper part of the space layer private chambers 14, 14, ... And the upper end of the sound insulation plate 12 of the sound receiving side 17 and the sound receiving side 17
, And error microphones 19, 19 ... Are installed respectively.
Further, in the vicinity of the sound source 16 and the sound source 16
A signal detecting means such as a microphone 21 is provided on the line 20 connecting the upper end of the duct type sound insulation wall 15 with the above. It should be noted that the signal detecting means is not limited to the microphone 21, and a vibration pickup may be attached to the sound source 16 to detect the sound source signal.
【００１１】図３は、本願発明のブロック図であり、前
述したようにダクト形遮音壁１５の夫々の空間層個室１
４，１４…にスピーカ１８，１８…及びエラーマイクロ
ホン１９，１９…を設置し、前記スピーカ１８，１８…
はアンプ２２，２２…及びＤ／Ａコンバータ２３，２３
…を介してディジタルシグナルプロセッサ（以下「ＤＳ
Ｐ」という）２４に接続され、前記エラーマイクロホン
１９，１９…はアンプ２５，２５…及びＡ／Ｄコンバー
タ２６，２６…を介してＤＳＰ２４に接続される。ま
た、音源１６の近傍に設けたマイクロホン２１はアンプ
２７及びＡ／Ｄコンバータ２８を介してＤＳＰ２４に接
続される。尚、２９はコンピュータである。FIG. 3 is a block diagram of the present invention. As described above, each space layer private room 1 of the duct type sound insulation wall 15 is described.
Speakers 18, 18 ... And error microphones 19, 19 ... are installed in the speakers 4, 18 ,.
Are amplifiers 22, 22, ... And D / A converters 23, 23
Via a digital signal processor (hereinafter "DS
, Which is connected to the DSP 24 via amplifiers 25, 25 ... And A / D converters 26, 26. Further, the microphone 21 provided near the sound source 16 is connected to the DSP 24 via the amplifier 27 and the A / D converter 28. Incidentally, 29 is a computer.
【００１２】而して、図１乃至図３に於いて、音源１６
から放射される騒音は、その一部はダクト形遮音壁１５
によって遮断され、他の一部は該ダクト形遮音壁１５の
上方を越えて受音側１７へ伝播しようとする。ここで、
音源１６の近傍に設けたマイクロホン２１によって音源
信号を検出し、該音源信号をアンプ２７で増幅した後に
Ａ／Ｄコンバータ２８にてＡ／Ｄ変換してＤＳＰ２４へ
入力する。ＤＳＰ２４に入力された音源信号は位相を反
転して出力され、Ｄ／Ａコンバータ２３，２３…にてＤ
／Ａ変換した後にアンプ２２，２２…で増幅し、前記ス
ピーカ１８，１８…にて再生される。Thus, in FIG. 1 to FIG. 3, the sound source 16
A part of the noise emitted from the duct-type sound insulation wall 15
The other part tries to propagate over the duct type sound insulation wall 15 to the sound receiving side 17. here,
A microphone 21 provided near the sound source 16 detects a sound source signal, which is amplified by an amplifier 27 and then A / D converted by an A / D converter 28 and input to the DSP 24. The sound source signal input to the DSP 24 is output with its phase inverted, and the D / A converters 23, 23 ...
After being A / A converted, it is amplified by the amplifiers 22, 22, ... And reproduced by the speakers 18, 18.
【００１３】前記スピーカ１８，１８…にて再生された
音波は、他のスピーカからの放射音波に干渉されること
なく、各空間層個室１４，１４…内にて平面波となって
上方へ放射される。そして、ダクト形遮音壁１５の上部
近傍にて、前記音源１６から伝播される音波と、スピー
カ１８，１８…から再生された逆位相の音波とが相互に
干渉して打ち消し合い、ダクト形遮音壁１５の受音側１
７へ伝播される騒音は極めて微弱となる。The sound waves reproduced by the speakers 18, 18 ... Are radiated upward as a plane wave in each space layer chamber 14, 14 without being interfered with the sound waves emitted from the other speakers. It Then, in the vicinity of the upper portion of the duct-type sound insulation wall 15, the sound wave propagated from the sound source 16 and the sound waves of the opposite phase reproduced from the speakers 18, 18 ... Interfere with each other and cancel each other out. Sound receiving side 1
The noise propagated to 7 becomes extremely weak.
【００１４】更に、該ダクト形遮音壁１５の上部に於い
て消音されなかった音波は、前述したエラーマイクロホ
ン１９，１９…によって検出され、アンプ２５，２５…
及びＡ／Ｄコンバータ２６，２６…を介してＤＳＰ２４
へフィードバックされる。ＤＳＰ２４では、フィードバ
ックされた信号に基づいて騒音の減衰状態を把握し、各
スピーカ１８，１８…に対する出力の音量、周波数スペ
クトル、位相等を随時補正して、エラーマイクロホン１
９，１９…の検出信号が可及的に零に近づくように制御
する。Further, the sound waves that have not been silenced above the duct type sound insulation wall 15 are detected by the above-mentioned error microphones 19, 19 ... And the amplifiers 25, 25.
And the DSP 24 via the A / D converters 26, 26 ...
Feedback to. The DSP 24 grasps the noise attenuation state based on the fed back signal and corrects the volume, frequency spectrum, phase, etc. of the output to each speaker 18, 18, ...
The detection signals of 9, 19, ... Are controlled so as to approach zero as much as possible.
【００１５】また、本発明者等は本発明の遮音装置を用
いて実験を試みたところ、前述したように受音側１７の
遮音板１２の上端且つ受音側１７にエラーマイクロホン
１９，１９…を設置した場合が、騒音の減衰量を最大に
することができた。尚、本発明は、本発明の精神を逸脱
しない限り種々の改変を為すことができ、そして、本発
明が該改変されたものに及ぶことは当然である。Further, the inventors of the present invention have conducted an experiment using the sound insulation device of the present invention. As described above, the error microphones 19, 19 ... Are provided on the upper end of the sound insulation plate 12 of the sound reception side 17 and the sound reception side 17. When installed, the amount of noise attenuation could be maximized. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.
【００１６】[0016]
【発明の効果】本発明は上記一実施例に詳述したよう
に、音源若しくは音源近傍に信号検出手段を設けてある
ので、音源の音量や位相等を正確に把握でき、空間層個
室に設けた音源装置に対して短時間に最適な信号を出力
することができる。従って、信号の処理速度が早くな
り、音源装置へ出力する信号の修正も迅速且つ正確に行
われるようになる。As described in detail in the above one embodiment, the present invention is provided with the signal detecting means in the sound source or in the vicinity of the sound source, so that the volume and phase of the sound source can be accurately grasped, and it is provided in the space layer private room. It is possible to output an optimum signal to the sound source device in a short time. Therefore, the processing speed of the signal is increased, and the signal output to the sound source device can be corrected quickly and accurately.
【００１７】斯くして、音源から放射される騒音は、ダ
クト形遮音壁の上部近傍に於いて極めて効果的に消音さ
れ、受音側に伝播される騒音は極めて微弱になる。Thus, the noise radiated from the sound source is extremely effectively silenced near the upper part of the duct type sound insulation wall, and the noise propagated to the sound receiving side becomes extremely weak.
【図１】本発明の一実施例を示す平面図。FIG. 1 is a plan view showing an embodiment of the present invention.
【図２】本発明の一実施例を示す縦断正面図。FIG. 2 is a vertical sectional front view showing an embodiment of the present invention.
【図３】本発明の一実施例を示すブロック図。FIG. 3 is a block diagram showing an embodiment of the present invention.
１１，１２ 遮音板 １３ 仕切板 １４ 空間層個室 １５ ダクト形遮音壁 １６ 音源 １７ 受音側 １８ スピーカ １９ エラーマイクロホン ２１ マイクロホン ２４ ティジタルシグナルプロセッサ 11, 12 Sound insulation plate 13 Partition plate 14 Space layer private room 15 Duct type sound insulation wall 16 Sound source 17 Sound receiving side 18 Speaker 19 Error microphone 21 Microphone 24 Digital signal processor
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０３Ｈ 21/00 8842−5Ｊ (72)発明者 大脇 雅直 茨城県つくば市大字鬼ケ窪字下山1043番１ 株式会社熊谷組技術研究所内 (72)発明者 杉木 陽次 茨城県つくば市大字鬼ケ窪字下山1043番１ 株式会社熊谷組技術研究所内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Internal reference number FI Technical indication H03H 21/00 8842-5J (72) Inventor Masanao Ohwaki 1043-1, Shimoyama, Onigakebo, Tsukuba, Ibaraki Kumagai Gumi Technology Research Institute Co., Ltd. (72) Inventor Yoji Sugiki 1043-1, Shimoyama, Onigaiku, Tsukuba, Ibaraki Prefecture
Claims (1)
に遮音板間を垂直方向に所定間隔で仕切り、上部が開放
された空間層個室を連設してダクト形遮音壁を形成し、
該ダクト形遮音壁にて音源側と受音側とを離隔し、前記
夫々の空間層個室の底部に音源装置を設置するととも
に、夫々の空間層個室の上部であって、受音側の遮音板
の上端且つ受音側にエラーマイクロホンを設置し、更
に、音源若しくは音源近傍に信号検出手段を設け、該信
号検出手段にて検出した音源信号の位相を反転するとと
もに、前記エラーマイクロホンの検出信号に基づき該反
転された信号を補正して前記音源装置へ出力する手段と
を設けたことを特徴とする能動制御形遮音装置。1. A duct-type sound-insulating wall is formed by vertically arranging two sound-insulating plates facing each other and partitioning the sound-insulating plates at predetermined intervals in a vertical direction, and connecting space-layer private chambers whose upper parts are open.
The sound source side and the sound receiving side are separated from each other by the duct type sound insulation wall, the sound source device is installed at the bottom of each of the space layer private rooms, and the sound insulating plate on the sound receiving side at the upper part of each space layer private room. An error microphone is installed at the upper end and the sound receiving side, and a signal detecting means is further provided in the sound source or in the vicinity of the sound source, and the phase of the sound source signal detected by the signal detecting means is inverted and the detection signal of the error microphone is set. And a means for correcting the inverted signal and outputting the corrected signal to the sound source device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5262298A JPH07114390A (en) | 1993-10-20 | 1993-10-20 | Active control type sound insulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5262298A JPH07114390A (en) | 1993-10-20 | 1993-10-20 | Active control type sound insulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07114390A true JPH07114390A (en) | 1995-05-02 |
Family
ID=17373845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5262298A Pending JPH07114390A (en) | 1993-10-20 | 1993-10-20 | Active control type sound insulating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07114390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002366161A (en) * | 2001-06-04 | 2002-12-20 | Denso Corp | Noise controller |
-
1993
- 1993-10-20 JP JP5262298A patent/JPH07114390A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002366161A (en) * | 2001-06-04 | 2002-12-20 | Denso Corp | Noise controller |
| JP4581293B2 (en) * | 2001-06-04 | 2010-11-17 | 株式会社デンソー | Noise control device |
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