AcSoft
Svantek UK

In-situ Absorption

Acoustic noise pollution can be reduced by absorbing sound energy. Absorbing material packages are used in many applications to attenuate sound. Knowing exactly the acoustic properties of your materials and the effectiveness of the applied material packages is a requirement to successfully reduce noise levels. The In-situ absorption setup is a solution to achieve just that.

 

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With a small, handheld impedance gun the acoustic absorption, reflection or impedance can be measured in just a few minutes, broad band and under normal and oblique angles. With a sound source at 23cm from the probe, noise is generated towards the sample. The impedance gun is equipped with a system designed to decouple the sensors from structure born vibration generated by the spherical loudspeaker. The sound pressure and acoustic particle velocity are measured directly on the surface of the material. The absorption & reflection coefficient can be obtained directly from the measured impedance as the complex ratio of sound pressure to particle velocity.

Applications include:

  • Material sample testing
  • EOL Quality Control
  • Component testing
  • Trim package validation

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