JP3463198B2 - Sound absorption / insulation performance test equipment - Google Patents
Sound absorption / insulation performance test equipmentInfo
- Publication number
- JP3463198B2 JP3463198B2 JP2000243655A JP2000243655A JP3463198B2 JP 3463198 B2 JP3463198 B2 JP 3463198B2 JP 2000243655 A JP2000243655 A JP 2000243655A JP 2000243655 A JP2000243655 A JP 2000243655A JP 3463198 B2 JP3463198 B2 JP 3463198B2
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- Prior art keywords
- sound
- test piece
- sound wave
- wave
- test
- Prior art date
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、吸音／遮音の性能
テスト装置に関し、より詳しくは、吸音材と遮音材の性
能を同時にテストできる吸音／遮音の性能テスト装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorption / sound insulation performance test device, and more particularly to a sound absorption / sound insulation performance test device capable of simultaneously testing the performances of a sound absorption material and a sound insulation material.
【０００２】[0002]
【従来の技術】音波は縦波の一種として、発音体が振動
を起こせばその周囲の空気の押引により空気の多い部分
と少ない部分が発生しながら、空気を媒質として伝播さ
れる。空気の多い部分と少ない部分は圧力の差を示し、
音波は空気圧力の変化により人間の耳に伝達されるもの
である。一方、音波の高低は音波振動数の高低によって
決定される。2. Description of the Related Art A sound wave is a kind of longitudinal wave, and when a sounding body vibrates, air is propagated using air as a medium with a large amount of air and a small amount of air generated by pushing and pulling air around it. The part with much air and the part with little air show the difference in pressure,
Sound waves are transmitted to the human ear due to changes in air pressure. On the other hand, the height of the sound wave is determined by the height of the sound wave frequency.
【０００３】この様な特性の音波は、その圧力が高すぎ
ると人間に騷音となることがある。よって、高い音波を
発生させる発音体を持つ設備や、外部からの騷音伝播を
遮断しなければならない建物等には、生活に必要なもの
として吸音材と遮音材を施してある。外部から入射した
音波を吸収する吸音材と外部に放散されようとする音波
や外部から入射しようとする音波を遮断する遮音材は、
前述したように、建築用資材や自動車の内蔵材等に多様
に用いられている。A sound wave having such characteristics may make a noise to humans if the pressure is too high. Therefore, a sound absorbing material and a sound insulating material are provided as necessary for daily life in equipment having a sounding body that generates high sound waves and in buildings where the noise propagation from the outside must be blocked. Sound absorbing materials that absorb sound waves that enter from the outside and sound insulation materials that block sound waves that are about to be dissipated to the outside and sound waves that are about to enter from the outside
As mentioned above, it is widely used for building materials, automobile interior materials and the like.
【０００４】一方、吸音材と遮音材はその用途に適した
機能を持たせる必要がある。すなわち、外部騷音があま
り高くない地域の建物に高性能の吸音材と遮音材を用い
る必要はなく、また、高い騷音低減効果の要求される自
動車の内蔵材には低性能の吸音材や遮音材は役に立たな
い。On the other hand, it is necessary for the sound absorbing material and the sound insulating material to have a function suitable for their use. In other words, it is not necessary to use high-performance sound absorbing materials and sound insulating materials for buildings in areas where external noise is not very high, and low-performance sound absorbing materials and Sound insulation is useless.
【０００５】従って、吸音材と遮音材の性能すなわち音
波を吸収する性能と音波の伝播を遮断する性能を表示す
ることが要求される。その表示がなければ適した性能を
持つ吸音材や遮音材を選択することができない。Therefore, it is required to display the performance of the sound absorbing material and the sound insulating material, that is, the performance of absorbing the sound wave and the performance of blocking the propagation of the sound wave. Without the indication, it is not possible to select a sound absorbing material or sound insulating material having suitable performance.
【０００６】このために用いられている従来の吸音性能
テスト装置の概略を図１に示した。図示のテスト装置
は、吸音性能テスト装置であり、試験管１の一端側には
吸音材の試験片２を配置し、他端側には試験管１内に、
前記試験片２に向けて音波を伝播するスピーカー３を設
けてある。試験管１内には前記スピーカー３からの入射
音波と吸音材の試験片２により反射された反射音波との
夫々の音圧を検出する２個のマイクロホン４を設け、前
記マイクロホン４により検出された音圧につきその音圧
スペクトルを求める周波数分析機５を設けてある。前記
周波数分析機５は、前記スピーカー３に音波信号を発生
させる音波波形を生成し、この音波波形は、増幅器６を
経て音響信号としてスピーカー３に転送される。そして
前記周波数分析機５には、前記マイクロホン４からの音
圧信号が入力されてその周波数分析を行なう。前記周波
数分析機５により前記音圧信号を分析したスペクトルデ
ータは、別途コンピュータ７に入力され、前記コンピュ
ータ７に予め実行可能に記憶されている演算プログラム
によって演算され、試験に供された吸音材の試験片２の
吸音性能が出力される。FIG. 1 shows an outline of a conventional sound absorbing performance test apparatus used for this purpose. The illustrated test device is a sound absorbing performance test device, in which a test piece 2 of a sound absorbing material is arranged at one end of the test tube 1 and inside the test tube 1 at the other end.
A speaker 3 that propagates a sound wave toward the test piece 2 is provided. In the test tube 1, two microphones 4 for detecting the sound pressure of each of the incident sound wave from the speaker 3 and the reflected sound wave reflected by the sound absorbing material test piece 2 are provided, and are detected by the microphone 4. A frequency analyzer 5 for determining the sound pressure spectrum of the sound pressure is provided. The frequency analyzer 5 generates a sound wave waveform that causes the speaker 3 to generate a sound wave signal, and the sound wave waveform is transferred to the speaker 3 as an acoustic signal through the amplifier 6. Then, the sound pressure signal from the microphone 4 is input to the frequency analyzer 5 and the frequency thereof is analyzed. Spectral data obtained by analyzing the sound pressure signal by the frequency analyzer 5 is separately input to the computer 7 and is calculated by a calculation program stored in advance in the computer 7 so as to be calculated. The sound absorbing performance of the test piece 2 is output.
【０００７】一方、遮音性能テスト装置は図に示さない
が、試験室内の残響室がコーンクリートに囲まれた構造
である。残響室内にはスピーカーが配置され、もう一つ
の残響室にはマイクロホンが配置された構造である。On the other hand, although the sound insulation performance test device is not shown in the figure, the reverberation room in the test room is surrounded by a cone cleat. A speaker is placed in the reverberation room and a microphone is placed in the other reverberation room.
【０００８】上記遮音性能テスト装置では、スピーカー
から発振された入射音波が遮音材に到達し、到達した入
射音波の中の前記遮音材を通過した透過音波がマイクロ
ホンにより検出され、検出された透過音波の音圧が周波
数分析機によりスペクトル解析され、その解析結果が別
途コンピュータ７で解析され、前記遮音材の遮音性能が
出力される。In the above sound insulation performance test device, the incident sound wave oscillated from the speaker reaches the sound insulation material, the transmitted sound wave of the arrived incident sound wave which has passed through the sound insulation material is detected by the microphone, and the detected transmission sound wave is detected. The sound pressure of the sound is spectrally analyzed by a frequency analyzer, and the analysis result is separately analyzed by the computer 7, and the sound insulation performance of the sound insulation material is output.
【０００９】[0009]
【発明が解決しようとする課題】ところで、上記従来の
吸音性能テスト装置は吸音材の性能しか測定できなかっ
た。そして、遮音材の性能も測定しようとすれば、遮音
性能テスト装置として残響室という高価な部屋を備える
設備を必要とするのである。By the way, the above-mentioned conventional sound absorbing performance testing device can measure only the performance of the sound absorbing material. Then, if the performance of the sound insulation material is to be measured, a facility equipped with an expensive room called a reverberation room is required as a sound insulation performance test device.
【００１０】殊に、従来の吸音テスト装置と、遮音テス
ト装置とは全く別の装置であった。従って、吸音材と遮
音材とを同時にテストすることが困難であった。しか
も、両テスト装置共に周波数分析機を備えているために
高価なものであり、吸音材や遮音材の吸音性能や遮音性
能を安価に測定することができなかった。In particular, the conventional sound absorption test device and the conventional sound insulation test device are completely different devices. Therefore, it is difficult to simultaneously test the sound absorbing material and the sound insulating material. Moreover, both test devices are expensive because they are equipped with a frequency analyzer, and it has been impossible to inexpensively measure the sound absorbing performance and sound insulating performance of the sound absorbing material and the sound insulating material.
【００１１】しかも、従来は周波数分析機で分析された
スペクトルデータをさらにコンピュータに再び入力し、
あらためてこれを解析して性能テストが完了するので、
性能テストに手間と時間を要し、非常に不便であった。Moreover, conventionally, the spectrum data analyzed by the frequency analyzer is input again to the computer,
Since this is analyzed again and the performance test is completed,
The performance test took time and effort and was very inconvenient.
【００１２】本発明に係る吸音／遮音の性能テスト装置
は、上述した従来のテスト装置の問題点を解消すること
を目的とし、一つの装置で吸音材及び遮音材の吸音性能
と遮音性能とを共にテストできると同時に、周波数分析
機の様な高価な試験設備を用いないことで、テストに要
するコストを画期的に低減でき、かつその性能テストも
簡単になる吸音／遮音の性能テスト装置を提供すること
にある。The sound absorption / sound insulation performance test apparatus according to the present invention aims to solve the above-mentioned problems of the conventional test apparatus, and the sound absorption performance and the sound insulation performance of the sound absorption material and the sound insulation material can be obtained by one device. A sound-absorption / sound-insulation performance test device that can test both at the same time and can dramatically reduce the cost required for testing by not using expensive test equipment such as a frequency analyzer and simplifying the performance test. To provide.
【００１３】[0013]
【課題を解決するための手段】前記目的を達成するため
に、本発明に係る吸音／遮音の性能テスト装置の第一の
構成は、一端側に吸音材の試験片が配置され、中間部に
遮音材の試験片が選択的に配置されるように構成した試
験管に、前記試験管の他端側に配置され、前記試験管内
に音波を出力するスピーカーを備えると共に、前記試験
管内に配置され、前記スピーカーから出力されて前記選
択的に配置される遮音材の試験片に入射される入射音波
と、前記遮音材の試験片から反射された反射音波の音圧
とを測定可能で且つ着脱自在なマイクロホンを備え、前
記選択的に配置される遮音材の試験片を透過する透過音
波と、前記吸音材の試験片から反射された反射音波の音
圧とを測定可能なマイクロホンを備え、前記マイクロホ
ンで検出された音圧を基に、前記遮音材の試験片および
吸音材の試験片の吸音性能と前記遮音材の試験片の遮音
性能とを演算するコンピュータを備えることを特徴とす
るものである。In order to achieve the above object, the first structure of the sound absorption / sound insulation performance test device according to the present invention is such that a test piece of a sound absorbing material is arranged at one end side and an intermediate part is provided. The test piece of the sound insulating material is arranged in the test tube, the test tube being arranged to be selectively arranged, arranged on the other end side of the test tube, and provided with a speaker for outputting a sound wave into the test tube. A sound pressure of an incident sound wave output from the speaker and incident on the selectively placed sound insulation test piece, and a reflected sound wave reflected from the sound insulation test piece
DOO equipped with and detachable microphone can measure a transmitted sound wave transmitted through the test piece sound insulation to be the selectively placed, and a sound pressure of the reflected waves reflected from the specimen prior Symbol sound absorbing material A sound-measuring material test piece and a sound-absorbing material are provided based on the sound pressure detected by the microphone.
Sound absorption performance of sound absorbing material test piece and sound insulation of sound insulating material test piece
It is characterized by comprising a computer for calculating the performance .
【００１４】そして、本発明に係る吸音／遮音テスト装
置の第二の構成は、上記第一の構成におけるコンピュー
タに、前記スピーカーから出力する音波信号を生成する
音波発生部と、前記マイクロホンからの音圧信号を透過
音波用と反射音波用とに各々分離するデータ分離部と、
前記データ分離部で分離した音圧データを基に、前記入
射音波及び、透過音波、反射音波の音圧スペクトルを求
めて、相互間の周波数別音圧数値差により吸音性能また
は遮音性能を演算する演算部とを設けてあることを特徴
とする。A second configuration of the sound absorption / insulation test device according to the present invention is the computer in the first configuration, wherein a sound wave generator for generating a sound wave signal output from the speaker and a sound from the microphone are generated. A data separation unit that separates the pressure signal into a transmitted sound wave and a reflected sound wave,
Based on the sound pressure data separated by the data separation unit, the sound pressure spectrum of the incident sound wave, the transmitted sound wave, and the reflected sound wave is obtained, and the sound absorption performance or the sound insulation performance is calculated by the difference in the sound pressure value for each frequency. And a calculation unit.
【００１５】上記第一の構成においては、試験管の一端
側に吸音材の試験片が配置され、他端側に試験管内に下
流側に向けて音波を出力するスピーカーが設けられ、試
験管の中間内部にはテストの用途別に遮音材の試験片が
選択的に配置される。前記吸音材の試験片に対して他端
側、即ちスピーカー側の試験管内に配置されたマイクロ
ホンにより、前記スピーカーから出力され、遮音材を通
過して前記吸音材の試験片に入射される入射音波と吸音
材の試験片から反射された反射音波の音圧が検出され
る。そして、前記マイクロホンにより検出された音圧を
基に、装備するコンピュータで前記吸音材の吸音特性が
演算される。また、前記遮音材の試験片に対して一端側
に配置された前記マイクロホンに加えて前記遮音材の試
験片に入射される入射音波を検出するマイクロホンが装
着される。前記一端側に配置されたマイクロホンは、前
記遮音材の試験片を通過した透過音波の音圧を測定す
る。こうして前記遮音材の試験片に対して一端側と他端
側とに配置されたマイクロホンの検出する音圧を基に、
前記コンピュータで前記遮音材の遮音性能が演算される
のである。この場合には、前記吸音材の試験片は、前記
透過音波を吸収する吸音材として機能する。さらに、前
記遮音材の試験片に入射される入射音波の音圧と、前記
遮音材の試験片から反射される反射音波の音圧とを基
に、前記コンピュータで前記遮音剤の吸音性能を演算す
ることができる。 従って、遮音材の試験片に入射される
入射音、遮音材の試験片から反射された反射音、遮音材
の試験片を透過する透過音、吸音材の試験片から反射さ
れた反射音に対応し、前記コンピュータで前記遮音材の
遮音性能と同時に、前記遮音材の吸音性能および前記吸
音材の吸音性能を演算するのである。 In the first configuration, the test piece of the sound absorbing material is arranged on one end side of the test tube, and the speaker for outputting a sound wave toward the downstream side is provided in the test tube on the other end side of the test tube. specimens sound insulating material by the intermediate internal test applications Ru are selectively disposed. The other end, i.e. arranged microphones to the speaker side of the in vitro on specimens before Symbol sound absorbing material, is output from the speaker, through the sound insulator
The sound pressure of the reflected waves reflected from the specimen of the incident sound wave and the sound absorbing material to be incident on the specimen of the intake sound material is detected filtered. Then, on the basis of the sound pressure detected by the microphone, the sound absorption characteristic of the sound absorbing material is calculated by the equipped computer. Also, a microphone for detecting an incident sound wave to be incident on the specimen of the sound insulation material in addition to the microphone disposed at one end side of the test piece before Symbol sound insulation material is mounted. The microphone arranged on the one end side measures the sound pressure of the transmitted sound wave that has passed through the test piece of the sound insulation material. Thus, based on the sound pressure detected by the microphones arranged on the one end side and the other end side with respect to the test piece of the sound insulating material,
The sound insulation performance of the sound insulation material is calculated by the computer. In this case, the sound absorbing material test piece functions as a sound absorbing material that absorbs the transmitted sound waves. Furthermore, before
The sound pressure of the incident sound wave incident on the test piece of the sound insulation material,
Based on the sound pressure of the reflected sound wave reflected from the sound insulation test piece
In addition, the computer calculates the sound absorption performance of the sound insulation agent.
You can Therefore, it is incident on the sound insulation test piece.
Incident sound, reflected sound from soundproof material test piece, sound insulation material
Sound transmitted through the test piece of
Corresponding to the reflected sound generated by the computer,
At the same time as the sound insulation performance, the sound insulation performance and
The sound absorption performance of the sound material is calculated.
【００１６】一方、上記第二の構成においては、上述の
ようにして検出した音圧を演算処理するコンピュータに
おいて、音波発生部で、目的に適う周波数の音波信号を
生成し、これを前記スピーカーに送出して、前記試験管
内で一端側に向けて音波を発振する。前記マイクロホン
で検出された前記スピーカーからの入射音波或いは前記
遮音材の試験片を透過した透過音波の音圧を入力して、
データ分離部で検出した音波データを入射音波と反射音
波の周波数に分離する。演算部では、前記データ分離部
で分離された入射音波及び、透過音波、反射音波の音圧
スペクトルを求めて、相互間の周波数別音圧数値差によ
り吸音性能と遮音性能を演算するのである。On the other hand, in the second configuration, in the computer for calculating the sound pressure detected as described above, the sound wave generator generates a sound wave signal having a frequency suitable for the purpose, and outputs the sound wave signal to the speaker. It is sent out and a sound wave is oscillated toward one end side in the test tube. Input the sound pressure of the incident sound wave from the speaker detected by the microphone or the transmitted sound wave transmitted through the test piece of the sound insulating material,
The sound wave data detected by the data separation unit is separated into the frequencies of the incident sound wave and the reflected sound wave. In the calculation unit, the sound pressure spectrum of the incident sound wave, the transmitted sound wave, and the reflected sound wave separated by the data separation unit is obtained, and the sound absorption performance and the sound insulation performance are calculated based on the difference in the sound pressure value for each frequency.
【００１７】その結果、コンピュータに音波分離部と演
算部が一体として構成ており、マイクロホンで検出され
た音波信号の音圧データから、演算部で吸音性能と遮音
性能とが直接演算され、測定されるのである。As a result, the sound wave separation unit and the calculation unit are integrated in the computer, and the sound absorption performance and the sound insulation performance are directly calculated and measured by the calculation unit from the sound pressure data of the sound wave signal detected by the microphone. It is.
【００１８】[0018]
【発明の実施の形態】以下、添付図面に基づき、本発明
の好適実施例を詳細に説明する。図２は本発明に係る吸
音／遮音の性能テスト装置を示す図で、図３は性能テス
ト装置に備えるコンピュータの構成を示すブロック図
で、図４は吸音性能のみをテストする場合の性能テスト
装置を示す図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 2 is a diagram showing a sound absorption / sound insulation performance test device according to the present invention, FIG. 3 is a block diagram showing a configuration of a computer provided in the performance test device, and FIG. 4 is a performance test device for testing only sound absorption performance. FIG.
【００１９】図２に示すように、本発明による吸音／遮
音の性能テスト装置は、中間部に選択的に配置される遮
音材Ｂの試験片２２と、一端側に配置された吸音材Ａの
試験片２１とが設置された試験管１０と、その試験管１
０に設けられ、前記一端側に向けて試験管１０内に向け
て音波信号を出力するスピーカー２０と、そのスピーカ
ー２０から出力された音波信号の音圧を検出する合計４
個のマイクロホン３０、３１と、音波信号を生成すると
共に検出された音圧により吸音／遮音性能を演算するプ
ログラムが実行可能に記憶されたコンピュータ４０とか
ら構成される。As shown in FIG. 2, the sound absorption / sound insulation performance test apparatus according to the present invention comprises a test piece 22 of the sound insulation material B selectively arranged in the middle portion and a sound absorption material A arranged on one end side. A test tube 10 in which a test piece 21 is installed, and the test tube 1
0, which outputs a sound wave signal toward the inside of the test tube 10 toward the one end side, and a total of 4 for detecting the sound pressure of the sound wave signal output from the speaker 20.
Each of the microphones 30 and 31 and a computer 40 in which a program for generating sound wave signals and calculating sound absorption / sound insulation performance based on the detected sound pressure are executably stored.
【００２０】試験管１０の一端側、即ち図面の右側には
吸音材Ａの試験片２１が配置され、他端側、即ち図面の
左側にはスピーカー２０が設けられる。試験管１０の中
間には遮音材Ｂの試験片２２が配置される。このような
配置によって、スピーカー２０から出力された音波信号
は入射音波として前記試験片２２に入射し、前記入射音
波の一部は前記試験片２２を透過し、前記試験片２２を
透過した透過音波は、吸音材Ａの試験片２１に入射音波
として入射する。４個のマイクロホン３０、３１が試験
管１０内に配置されており、そのうちの２個のマイクロ
ホン３０はスピーカー２０と遮音材Ｂの試験片２２との
間に配置され、残り２個のマイクロホン３１は遮音材Ｂ
の試験片２２と吸音材Ａの試験片２１との間に配置され
る。前記マイクロホン３０は、前記試験片２２への入射
音波と、前記試験片２２からの反射音波との、夫々の音
圧を検出する。また、前記マイクロホン３１は、前記試
験片２２を透過した透過音波、即ち前記吸音材Ａの試験
片２１への入射音波と、前記試験片２１からの反射音波
との、夫々の音圧を検出する。コンピュータ４０は、ス
ピーカー２０に音響信号を送出し、各マイクロホン３
０、３１で検出した音波信号の音圧が、音圧データとし
て前記コンピュータ４０に入力される。演算部４６で
は、前記マイクロホン３０、３１から入力された音圧デ
ータを、各音波に分離して音圧スペクトルを求め、夫々
の音圧信号の間における周波数別音圧数値差から、前記
遮音材Ｂの遮音性能と前記吸音材Ａの吸音性能とを演算
し測定するのである。A test piece 21 of the sound absorbing material A is arranged on one end side of the test tube 10, that is, on the right side in the drawing, and a speaker 20 is provided on the other end side, that is, on the left side in the drawing. A test piece 22 of the sound insulating material B is arranged in the middle of the test tube 10. With such an arrangement, the sound wave signal output from the speaker 20 is incident on the test piece 22 as an incident sound wave, and a part of the incident sound wave is transmitted through the test piece 22 and transmitted through the test piece 22. Enters the test piece 21 of the sound absorbing material A as an incident sound wave. Four microphones 30 and 31 are arranged in the test tube 10, two microphones 30 of which are arranged between the speaker 20 and the test piece 22 of the sound insulation material B, and the other two microphones 31 are arranged. Sound insulation material B
It is arranged between the test piece 22 of No. 2 and the test piece 21 of the sound absorbing material A. The microphone 30 detects sound pressures of an incident sound wave on the test piece 22 and a reflected sound wave from the test piece 22. The microphone 31 detects the sound pressure of each of the transmitted sound wave that has passed through the test piece 22, that is, the sound wave that is incident on the test piece 21 of the sound absorbing material A and the reflected sound wave from the test piece 21. . The computer 40 sends an acoustic signal to the speaker 20, and each microphone 3
The sound pressure of the sound wave signal detected at 0 and 31 is input to the computer 40 as sound pressure data. In the calculation unit 46, the sound pressure data input from the microphones 30 and 31 is separated into each sound wave to obtain a sound pressure spectrum, and the sound insulation material is calculated from the frequency difference of the sound pressure values between the respective sound pressure signals. The sound insulation performance of B and the sound absorption performance of the sound absorbing material A are calculated and measured.
【００２１】特に、本発明によれば、自身の備えるコン
ピュータ４０で吸音性能と遮音性能とを、周波数分析機
の様な他の計測装備を用いることなく、同時に演算でき
る。このためのコンピュータ４０の構成について説明す
ると、図３に示すように、コンピュータ４０は音波発生
部４１を備えている。音波発生部４１で生成した音波波
形は、デジタル増幅部４２により増幅した後、サウンド
カード４３で音響信号に変換され、スピーカー２０に向
けて送出される。前記スピーカー２０は、入力される音
響信号によって試験管１０内で一端側に向けて音波信号
を出力する。前記試験管１０内で前記スピーカー２０と
遮音材Ｂの試験片２２との間に配置されたマイクロホン
３０は、前記スピーカー２０から出力される音波を、前
記試験片２２への入射音波として、また、前記入射音波
が前記試験片２２により反射された音波を反射音波とし
て、夫々の音圧を検出する。また、前記試験片２２と吸
音材Ａの試験片２１との間に配置されたマイクロホン３
１は、前記試験片２２を透過した音波を、前記試験片２
２に対する透過音波として、また同時に、前記試験片２
１への入射音波として、さらに、その入射音波が前記試
験片２１により反射された音波を、前記試験片２１の反
射音波として、夫々の音圧を検出する。In particular, according to the present invention, the sound absorbing performance and the sound insulating performance can be simultaneously calculated by the computer 40 included in the computer 40 without using other measuring equipment such as a frequency analyzer. To explain the configuration of the computer 40 for this purpose, as shown in FIG. 3, the computer 40 includes a sound wave generator 41. The sound wave waveform generated by the sound wave generation unit 41 is amplified by the digital amplification unit 42, converted into an acoustic signal by the sound card 43, and sent out to the speaker 20. The speaker 20 outputs a sound wave signal toward one end side in the test tube 10 according to the input sound signal. The microphone 30 arranged between the speaker 20 and the test piece 22 of the sound insulating material B in the test tube 10 uses a sound wave output from the speaker 20 as an incident sound wave to the test piece 22, and The sound pressure of each of the incident sound waves reflected by the test piece 22 is used as a reflected sound wave to detect each sound pressure. In addition, the microphone 3 arranged between the test piece 22 and the test piece 21 of the sound absorbing material A.
The reference numeral 1 designates the sound wave transmitted through the test piece 22 as the test piece 2
As a transmitted sound wave for 2, and at the same time, the test piece 2
As the incident sound wave on the test piece 1, the sound wave reflected by the test piece 21 is detected as the reflected sound wave of the test piece 21, and the sound pressure of each is detected.
【００２２】一方、マイクロホン３０、３１で検出され
た音圧はアナログデータであるため、このアナログデー
タをデジタルデータに変換するアナログ／デジタル変換
部４４をコンピュータ４０に設けてある。アナログ／デ
ジタル変換部４４で変換された後のデジタルデータは、
入射音波の音圧と反射音波の音圧とが重畳した音圧デー
タである。このうちの前記マイクロホン３０からの重畳
した音圧データは、データ分離部４５で、試験片２２へ
の入射音波の音圧データと試験片２２からの反射音波の
音圧データとに分離し、前記マイクロホン３１からの重
畳した音圧データは、前記試験片２２からの透過音波、
即ち試験片２１への入射音波の音圧データと前記試験片
２１からの反射音波の音圧データとに分離する。ここ
で、データ分離部４５で入射音波の音圧と反射音波の音
圧とに音圧データを分離する技術は色んな学術論文に発
表されており、本発明ではそれら公知の技術を吸音性能
と遮音性能の測定に応用する。上記のように分離した音
圧データを入力して演算部４６で演算し、入射音波及び
透過音波、反射音波の音圧スペクトルを求め、求めた夫
々の音圧スペクトルの周波数別音圧数値差から吸音性能
と遮音性能とを演算して測定するのである。On the other hand, since the sound pressure detected by the microphones 30 and 31 is analog data, the computer 40 is provided with an analog / digital converter 44 for converting the analog data into digital data. The digital data converted by the analog / digital converter 44 is
It is sound pressure data in which the sound pressure of the incident sound wave and the sound pressure of the reflected sound wave are superimposed. The sound pressure data superposed from the microphone 30 among them is separated into the sound pressure data of the incident sound wave on the test piece 22 and the sound pressure data of the reflected sound wave from the test piece 22 by the data separating section 45, and The superimposed sound pressure data from the microphone 31 is the transmitted sound wave from the test piece 22,
That is, the sound pressure data of the incident sound wave on the test piece 21 and the sound pressure data of the reflected sound wave from the test piece 21 are separated. Here, the technology of separating the sound pressure data into the sound pressure of the incident sound wave and the sound pressure of the reflected sound wave in the data separation unit 45 has been published in various academic papers, and in the present invention, those known technologies are applied to the sound absorption performance and the sound insulation. Applied to performance measurement. The sound pressure data separated as described above is input and calculated by the calculation unit 46 to obtain the sound pressure spectra of the incident sound wave, the transmitted sound wave, and the reflected sound wave, and from the sound pressure numerical value difference for each frequency of the obtained sound pressure spectra. The sound absorption performance and the sound insulation performance are calculated and measured.
【００２３】以下、上記の通り構成された本実施例によ
る性能テスト装置で吸音性能と遮音性能をテストする動
作を詳細に説明する。The operation of testing the sound absorbing performance and the sound insulating performance by the performance test apparatus according to the present embodiment configured as described above will be described in detail below.
【００２４】音波発生部４１で生成した音波波形は、デ
ジタル増幅部４２により増幅された後、サウンドカード
４３で音響信号に変換されてスピーカー２０に送出され
る。スピーカー２０から出力された音波信号は、先ず遮
音材Ｂの試験片２２に入射されるが、この入射音波の音
圧が前方に配置された２個のマイクロホン３０により検
出される。遮音材Ｂの試験片２２への入射音波の一部は
試験片２２により遮断され、残りの音波が透過音波とし
て遮音材Ｂの試験片２２を透過する。この試験片２２を
透過した透過音波が後方、即ち一端側に配置された２個
のマイクロホン３１により検出される。マイクロホン３
０で検出された入射音波とマイクロホン３１で検出され
た透過音波の音圧が音圧信号としてコンピュータ４０に
入力されて処理される。The sound wave waveform generated by the sound wave generator 41 is amplified by the digital amplifier 42, converted into an acoustic signal by the sound card 43, and sent to the speaker 20. The sound wave signal output from the speaker 20 is first incident on the test piece 22 of the sound insulation material B, and the sound pressure of this incident sound wave is detected by the two microphones 30 arranged in the front. A part of the sound wave incident on the test piece 22 of the sound insulation material B is blocked by the test piece 22, and the remaining sound wave passes through the test piece 22 of the sound insulation material B as a transmitted sound wave. The transmitted sound wave that has passed through the test piece 22 is detected by the two microphones 31 arranged at the rear side, that is, at one end side. Microphone 3
The sound pressures of the incident sound wave detected by 0 and the transmitted sound wave detected by the microphone 31 are input to the computer 40 as a sound pressure signal and processed.
【００２５】一方、透過音波は吸音材Ａの試験片２１に
入射されるので、この透過音波は吸音材Ａの試験片２１
に対しては入射音波となる。前記試験片２１に入射した
入射音波中の一部は吸音材Ａの試験片２１に吸収され、
残りが反射される。反射した反射音波の音圧もマイクロ
ホン３１で検出され、同様に音圧信号としてコンピュー
タ４０に入力される。On the other hand, since the transmitted sound wave is incident on the test piece 21 of the sound absorbing material A, the transmitted sound wave is the test piece 21 of the sound absorbing material A.
Is an incident sound wave. Part of the incident sound wave incident on the test piece 21 is absorbed by the test piece 21 of the sound absorbing material A,
The rest is reflected. The sound pressure of the reflected sound wave reflected is also detected by the microphone 31, and is similarly input to the computer 40 as a sound pressure signal.
【００２６】各マイクロホン３０、３１からの音圧信号
はアナログ／デジタル変換部４４によりデジタルデータ
に変換される。前記マイクロホン３０からの音圧信号
は、デジタルデータに変換された後、データ分離部４５
で遮音材Ｂの試験片２２への入射音波の音圧データと前
記試験片２２からの反射音波の音圧データとに分離さ
れ、前記マイクロホン３１からの音圧信号は、同様にデ
ジタルデータに変換された後、前記試験片２２からの透
過音波の音圧データと吸音材Ａの試験片２１からの反射
音波の音圧データとに分離される。前記試験片２２に関
する入射音波と透過音波の音圧に該当する音圧データを
演算部４６で演算処理すれば、入射音波と透過音波の音
圧スペクトルが求められる。求めた音圧スペクトルの中
で、対応する音波周波数の前記遮音材Ｂの試験片２２へ
の入射音波と前記試験片２２を透過した透過音波との間
の音圧差により遮音材Ｂの試験片２２の遮音性能を測定
する。The sound pressure signals from the microphones 30 and 31 are converted into digital data by the analog / digital converter 44. The sound pressure signal from the microphone 30 is converted into digital data, and then the data separation unit 45.
Is separated into sound pressure data of the incident sound wave on the test piece 22 of the sound insulation material B and sound pressure data of the reflected sound wave from the test piece 22, and the sound pressure signal from the microphone 31 is similarly converted into digital data. After that, the sound pressure data of the transmitted sound wave from the test piece 22 and the sound pressure data of the reflected sound wave from the test piece 21 of the sound absorbing material A are separated. When the sound pressure data corresponding to the sound pressures of the incident sound wave and the transmitted sound wave on the test piece 22 is processed by the calculation unit 46, the sound pressure spectra of the incident sound wave and the transmitted sound wave are obtained. In the obtained sound pressure spectrum, the test piece 22 of the sound insulating material B is caused by the sound pressure difference between the incident sound wave of the sound insulating material B of the corresponding sound wave frequency on the test piece 22 and the transmitted sound wave transmitted through the test piece 22. The sound insulation performance of is measured.
【００２７】一方、前記マイクロホン３１からの音圧信
号に基づく音圧データを前記データ分離部４５で分離し
た後の前記試験片２２からの透過音波を前記試験片２１
への入射音波とし、その音圧データと、前記試験片２１
からの反射音波の音圧データを前記演算部４６で演算処
理し、前記試験片２１への入射音波と前記試験片２１か
らの反射音波との間の音圧差により吸音材Ａの試験片２
１の吸音性能を測定する。尚、前記マイクロホン３０か
らの音圧信号を基に分離した後の前記試験片２２への入
射音波の音圧データと、前記試験片２２からの反射音波
の音圧データと、前記マイクロホン３１からの音圧信号
を基に分離した後の前記試験片２２からの透過音波の音
圧データとから、前記遮音材Ｂの試験片２２の吸音性能
を測定することもできる。On the other hand, the transmitted sound wave from the test piece 22 after the sound pressure data based on the sound pressure signal from the microphone 31 has been separated by the data separation section 45 is the test piece 21.
Sound pressure data and the test piece 21.
The sound pressure data of the reflected sound wave from the test piece 2 of the sound absorbing material A is calculated by the calculation unit 46, and the sound pressure difference between the incident sound wave to the test piece 21 and the reflected sound wave from the test piece 21 is used.
The sound absorption performance of 1 is measured. It should be noted that the sound pressure data of the incident sound wave on the test piece 22 after separation based on the sound pressure signal from the microphone 30, the sound pressure data of the reflected sound wave from the test piece 22, and the sound from the microphone 31. It is also possible to measure the sound absorption performance of the test piece 22 of the sound insulating material B from the sound pressure data of the transmitted sound wave from the test piece 22 after separation based on the sound pressure signal.
【００２８】つまり、本発明に係る吸音／遮音の性能テ
スト装置によれば、吸音材Ａの吸音性能と遮音材Ｂの遮
音性能とを同時に測定できるだけでなく、前記遮音材Ｂ
の吸音性能も同時に測定できるのである。That is, according to the sound absorption / sound insulation performance test apparatus of the present invention, not only the sound absorption performance of the sound absorption material A and the sound insulation performance of the sound insulation material B can be measured at the same time, but also the sound insulation material B can be measured.
The sound absorption performance of can be measured at the same time.
【００２９】ところで、上述の吸音／遮音の性能テスト
装置を用いて吸音材だけの吸音性能をテストする場合に
は、図４に示すように遮音材Ｂの試験片２２は、試験管
１０から除去し、或いはこれを配置せず、着脱自在に選
択的に配置された２個のマイクロホン３０も撤去し、或
いはこれを用いることなく、吸音材Ａの試験片２１に対
する入射音波と反射音波との音圧データを演算処理すれ
ば、吸音材Ａの試験片２１の吸音性能のみを測定するこ
ともできる。また、マイクロホン３０、３１を共に用い
て、遮音材Ｂだけの性能テストを行うことも可能であ
る。この場合、前記吸音材Ａの試験片２１に代えて、吸
音材Ａを配置してあることが好ましい。前記マイクロホ
ン３１からの音圧信号に関しても、上述と同様に前記遮
音材Ｂの試験片２２からの透過音波と前記吸音材Ａから
の反射音波とに分離して、前記遮音材Ｂへの入射音波の
音圧データと前記遮音材Ｂからの透過音波の音圧データ
とを基に前記試験片２２の遮音性能を測定すればよい。By the way, when the sound absorbing performance of only the sound absorbing material is tested by using the above sound absorbing / sound insulating performance testing device, the test piece 22 of the sound insulating material B is removed from the test tube 10 as shown in FIG. Alternatively, without disposing this, the two microphones 30 which are selectively arranged in a removable manner are also removed, or the sound waves of the incident sound wave and the reflected sound wave to the test piece 21 of the sound absorbing material A are not used. By calculating the pressure data, it is possible to measure only the sound absorbing performance of the test piece 21 of the sound absorbing material A. It is also possible to use both the microphones 30 and 31 to perform a performance test of only the sound insulation material B. In this case, it is preferable that the sound absorbing material A is arranged in place of the test piece 21 of the sound absorbing material A. Also regarding the sound pressure signal from the microphone 31, the sound wave incident on the sound insulating material B is separated into the transmitted sound wave from the test piece 22 of the sound insulating material B and the reflected sound wave from the sound absorbing material A as in the above. The sound insulation performance of the test piece 22 may be measured based on the sound pressure data of No. 1 and the sound pressure data of the transmitted sound wave from the sound insulation material B.
【００３０】また、コンピュータ４０の構成も図３に示
した例に限るものではなく、マイクロホン３０、３１か
らの音圧信号を処理して試験片の吸音性能或いは遮音性
能を出力するようにプログラムしたものであればよい。
前記コンピュータ４０に記憶させるプログラムは、前記
マイクロホン３０、３１が共に１個宛であってもよいよ
うに構成することも可能である。The configuration of the computer 40 is not limited to the example shown in FIG. 3, and it is programmed to process the sound pressure signals from the microphones 30 and 31 and output the sound absorbing performance or sound insulating performance of the test piece. Anything will do.
The program stored in the computer 40 may be configured such that both of the microphones 30 and 31 may be addressed to one.
【００３１】[0031]
【発明の効果】以上説明したように、本発明によって、
遮音材及び吸音材に入射される音波に関する音圧データ
が、コンピュータで直接処理でき、試験片の吸音性能と
遮音性能が同時に測定できる。従って、遮音材や防音材
の吸音性能と遮音性能のテストに要する時間と手間を低
減でき、且つ、そのためのコストを画期的に低減できる
ようになった。As described above, according to the present invention,
Sound pressure data relating to sound waves incident on the sound insulation material and sound absorption material can be directly processed by a computer, and the sound absorption performance and sound insulation performance of the test piece can be measured at the same time. Therefore, it is possible to reduce the time and labor required for testing the sound absorbing performance and the sound insulating performance of the sound insulating material and the sound insulating material, and to significantly reduce the cost therefor.
【００３２】尚、本発明は、本実施例に限られるもので
はない。本発明の趣旨から逸脱しない範囲内で多様に変
更実施することが可能である。The present invention is not limited to this embodiment. Various modifications can be made without departing from the spirit of the present invention.
【図１】従来の吸音性能テスト装置の構成説明図FIG. 1 is an explanatory diagram of a configuration of a conventional sound absorption performance test device.
【図２】本発明に係る吸音／遮音の性能テスト装置の一
例を示す構成説明図FIG. 2 is a structural explanatory view showing an example of a sound absorption / sound insulation performance test device according to the present invention.
【図３】コンピュータの構成を示すブロック図FIG. 3 is a block diagram showing the configuration of a computer.
【図４】吸音性能のみをテストする場合における吸音／
遮音の性能テスト装置の使用例を示す構成説明図[Fig. 4] Sound absorption / when only sound absorption performance is tested
Configuration explanatory diagram showing an example of using the sound insulation performance test device
１０ 試験管 ２０ スピーカー ２１ 吸音材の試験片 ２２ 遮音材の試験片 ３０、３１ マイクロホン ４０ コンピュータ ４１ 音波発生部 ４５ データ分離部 ４６ 演算部 Ａ 吸音材 Ｂ 遮音材 10 test tubes 20 speakers 21 Sound absorbing material test piece 22 Sound insulation material test piece 30, 31 microphone 40 computers 41 Sound wave generator 45 data separator 46 Operation part A sound absorbing material B Sound insulation material
Claims (2)
間部に遮音材の試験片が選択的に配置されるように構成
した試験管に、 前記試験管の他端側に配置され、前記試験管内に音波を
出力するスピーカーを備えると共に、 前記試験管内に配置され、前記スピーカーから出力され
て前記選択的に配置される遮音材の試験片に入射される
入射音波と、前記遮音材の試験片から反射された反射音
波の音圧とを測定可能で且つ着脱自在なマイクロホンを
備え、 前記選択的に配置される遮音材の試験片を透過する透過
音波と、前記吸音材の試験片から反射された反射音波の
音圧とを測定可能なマイクロホンを備え、 前記マイクロホンで検出された音圧を基に、前記遮音材
の試験片および吸音材の試験片の吸音性能と前記遮音材
の試験片の遮音性能とを演算するコンピュータを備える
吸音／遮音の性能テスト装置。1. A test tube configured such that a test piece made of a sound absorbing material is arranged at one end side and a test piece made of a sound insulation material is selectively arranged at an intermediate portion, and the test piece is arranged at the other end side of the test tube. An incident sound wave provided in the test tube, the sound wave being disposed in the test tube, being output from the speaker and being incident on the selectively arranged sound insulation material test piece; and the sound insulation material. Sound reflected from the test piece
A sound pressure waves comprising a possible and detachable microphone measurements, the transmitted sound wave transmitted through the test piece sound insulation to be the selectively placed, before Symbol of the reflected waves reflected from the sound-absorbing material of the test piece A microphone capable of measuring sound pressure, and based on the sound pressure detected by the microphone, the sound insulation material
Absorption Performance of Test Specimens and Sound Absorbing Specimens and Sound Insulation Materials
Sound absorption / sound insulation performance test device equipped with a computer that calculates the sound insulation performance of the test piece of .
ら出力する音波信号を生成する音波発生部と、前記マイ
クロホンからの音圧信号を透過音波用と反射音波用とに
各々分離するデータ分離部と、前記データ分離部で分離
した音圧データを基に、前記入射音波及び、透過音波、
反射音波の音圧スペクトルを求めて、相互間の周波数別
音圧数値差により吸音性能または遮音性能を演算する演
算部とを設けてある請求項１に記載の吸音／遮音の性能
テスト装置。2. The computer includes a sound wave generator that generates a sound wave signal output from the speaker; a data separator that separates a sound pressure signal from the microphone into a transmitted sound wave and a reflected sound wave. Based on the sound pressure data separated by the data separation unit, the incident sound wave and the transmitted sound wave,
The sound absorption / sound insulation performance test device according to claim 1, further comprising: a calculation unit that calculates a sound pressure spectrum of the reflected sound waves and calculates a sound absorption performance or a sound insulation performance based on a sound pressure numerical value difference between frequencies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000243655A JP3463198B2 (en) | 2000-08-11 | 2000-08-11 | Sound absorption / insulation performance test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000243655A JP3463198B2 (en) | 2000-08-11 | 2000-08-11 | Sound absorption / insulation performance test equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002054988A JP2002054988A (en) | 2002-02-20 |
| JP3463198B2 true JP3463198B2 (en) | 2003-11-05 |
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|---|---|---|---|
| JP2000243655A Expired - Fee Related JP3463198B2 (en) | 2000-08-11 | 2000-08-11 | Sound absorption / insulation performance test equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030095918A (en) * | 2002-06-15 | 2003-12-24 | 이동복 | Sound absorption rate measuring device for underwater sound absorbing material with sensor calibration function |
| KR20040037776A (en) * | 2002-10-30 | 2004-05-07 | 현대자동차주식회사 | System for measuring transmission loss for intake and exhaust system in vehicles |
| JP4712564B2 (en) * | 2006-01-18 | 2011-06-29 | 株式会社オーディオテクニカ | Acoustic resistance measuring device and method for acoustic resistance material |
| JP5398428B2 (en) * | 2009-09-01 | 2014-01-29 | 株式会社オーディオテクニカ | Acoustic resistance measuring device for acoustic resistance material |
| JP5641999B2 (en) * | 2011-03-25 | 2014-12-17 | フォスター電機株式会社 | Acoustic characteristic measurement system and acoustic characteristic measurement method |
| JP5509150B2 (en) * | 2011-05-10 | 2014-06-04 | 株式会社コベルコ科研 | Acoustic tube and acoustic characteristic measuring device |
| CN103439407A (en) * | 2013-08-09 | 2013-12-11 | 无锡吉兴汽车声学部件科技有限公司 | Tool for carrying out sound insulation testing on automobile acoustic part material |
| CN104407056B (en) * | 2014-11-28 | 2017-11-07 | 歌尔股份有限公司 | Sound-absorbing material impedance operator and dilatation performance testing device and method of testing |
| RU2653556C1 (en) * | 2017-03-13 | 2018-05-11 | Олег Савельевич Кочетов | Stand for vibroacoustic tests of samples of elastic elements of vibration isolation systems and sound absorption elements of the facing of premises submitted to increased noise and vibration levels |
| RU2652139C1 (en) * | 2017-03-13 | 2018-04-25 | Олег Савельевич Кочетов | Method of acoustic testing of sound absorbers with resonant elements |
| KR102272478B1 (en) * | 2019-12-06 | 2021-07-06 | 한국표준과학연구원 | Performance measurement apparatus of omnidirectional gradient index and energy harvester, and method thereof |
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