Automotive NVH

Non contact vibration

Close to a rigid object, Microflown acoustical particle velocity sensors can be used for the non contact measurement of the normal component of the structural velocity. Close to a vibrating surface (in the socalled very nearfield) the first layer of air is incompressible therefore the structural velocity of the surface and the acoustic particle velocity in the neighboring air are of the same magnitude. The Microflown sensor is proven to work in the range from 0.1Hz up to 25kHz. The sensor can be used on all type of materials and doesn't need a line of seight as the vibrometer. Furthermore its non contact so no mass load is added like with accelerometers. Next to this there is also the possibility to listen to the signal and thus vibration pattern and modes! As the Microflown can also measure the airborne sound.

Features

  • Frequency range 0.1Hz - 25kHz
  • Non contact method
  • Compact
  • Also including airborne sound measurements
  • Suitable for all types of surfaces
  • No point of stability required

 

Publications

Ebook