建築音響テストソリューション

Building Acoustics Solutions

建築音響では室内の音環境を対象とし、環境の妨げとなる騒音について、室内外から伝搬する騒音の遮断性能を測定します。騒音については空気伝搬固体伝搬によるものがあります。

建築音響は、室内の音響特性そのものを評価する室内音響と区別されています。

このページでは、主に建築音響測定を実施する上で必要になる測定器、そして現場における測定方法について紹介いたします。

 

建築音響向けの推奨ソリューション

建築音響で必要とされる測定項目とは?

建物の二室間の遮音性能を測定します。一方の室の音源から放射されたサウンドレベルを、それぞれの室で測定し、室間のレベル差をとります。

空気伝搬音と衝撃音は、次のように区別されています。

  • 空気伝搬音とは、交通騒音や隣の部屋にいる人の話し声など、空気を媒体にして伝わる音のことをいいます。
  • 衝撃音とは、足音、ドアの開閉、家具の移動、排水管など、壁や床に振動が起こる際に発生する音のことをいいます。

STCまたはSRI値を求める際、暗騒音残響時間RT60測定が必要になることがあります。

 

空気伝搬音の遮音性能の測定方法について

The measurement principle is simply to create a measured noise in the first room (the sending room) and compare that to a measurement in the second room (the receiving room).

  • Generate a reference test signal (e.g. Pink Noise) in the sending room by using an omnidirectional loudspeaker.
  • Measure the noise spectrum both in the sending and the receiving room.
  • Correct the reading of the receiving room by deducting any disturbing background noise, and of the room effect (if the receiving room is reverberant, the sound level will be higher)

The airborne sound insulation of facades is measured in the same manner. In that case, the test signal source is positioned outside the building in the front of the facade partition under investigation.

Building Acoustics Airborne sound insulation measurement

Airborne sound insulation measurement

 

衝撃音の遮音性能の測定方法について

For impact sound insulation measurement, a calibrated Tapping Machine is used to generate the noise by knocking on the floor (a standardized rubber ball can also be used).

  • Properly install and run the Tapping Machine in the sending room.
  • Measure the noise spectrum in the receiving room.
  • Correct the reading in the receiving room by deducting any disturbing background noise and the room effect (if the receiving room is reverberant, the sound level will be higher).

Building Acoustics Impact sound insulation measurement

Impact sound insulation measurement

 

How to measure façade sound insulation?

A façade is an exterior side of a building. The soundproofing principles are essentially the same as those for interior walls. When measuring façades, the sound source is positioned outside the building.

When measuring, a pink noise is used as a test signal. You need a speaker that is powerful enough to produce the desired sound level in the frequency band from 50 Hz to 10 kHz as uniformly as possible.

façade sound insulation?

Façade sound insulation measurement

 

どのような測定器が必要となるのか?

You will need a Sound Level Meter that is capable of measuring the required acoustic parameters in accordance with the standards. You will also need a Dodecahedron Loudspeaker as a sound source for airborne sound insulation measurements, and a Tapping Machine to produce the impact sounds. Furthermore, using a professional software package for controlling the process and reporting the results may simplify the task.


1) サウンドレベルメータ

The XL2 Acoustic Analyzer is key to the building acoustics measurement kit. It is used to measure the levels, of the generated sound, in the sending and receiving rooms. The XL2 can be controlled remotely, enabling the Sound Insulation Reporter software to control the entire measurement process, by automatically acquiring, evaluating and reporting on the measurement data.
 

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2) 12面体スピーカー

The DS3 Dodecahedron Speaker, together with the PA3 Power Amplifier, meets all the requirements of the ISO 16283 standard. In addition, we offer impressive performance data; with a weight of only 7.5 kg and a typical sound power of 120.5 dB, the DS3 is convenient to carry around on site. By pressing a button on the supplied wireless remote control, the test signal can be comfortably switched on and off from outside the sending room.

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3) タッピングマシン

The TM3 Tapping Machine produces the impacts on the floor to determine the impact sound insulation. The hammers in this PTB-approved precision instrument hit the ground at a prescribed rate and with a constant, measured force. The remote-controlled TM3 is compliant with the standards that define building acoustics.

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4) レポーティングソフトウェア

FX100 Control Software

Last but not least, the measurement results obtained by the XL2 can be easily imported into the "Sound Insulation Reporter". This PC software then calculates the required results for the airborne and impact sound insulation in accordance with the selected standards.

遮音性能評価レポーターについて詳しくはこちら


You want to know more about our measurement instruments for building acoustics?

お問い合わせはこちら

 

国際規格について

Building Acoustics measurements are defined by international and national standards.

  • The optimized frequency response of the Dodecahedron Speaker Set ensures precise measurements in accordance with the ISO 16283 standards.
  • The TM3 Tapping Machine is compliant to the standards ISO 16283-2, ISO 717-2, ISO 10140-3/-4/-5, ISO 140-6/-7/-8, DIN 52210-6, ASTM E492, ASTM E1007.
  • The Sound Insulation Reporter software adheres to the ISO 16283, ISO 140, ISO 717, ISO 10140, DIN 4109, BB93, Document E, ASTM E336, ASTM E413, ASTM E1007, ASTM E989, ASTM E966, ASTM E1332, GB/T 19889, and SIA 181 Standards.
  • The solution offered by NTi Audio is compliant with the ISO 16283, ISO 140 and ASTM E336 standards.

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関連アプリケーション

Here you can dig deeper into each of the actual measurements:

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