- Easy finding of modes / vibration pattern determination
- Easy finding of sources ( also instationary sources like "Squeak &
Rattle" )
- Direct listening to sound pressure and particle velocity
- Easy and quick to use
- Portable
Scan and Listen is a tool that’s been developed for first and quick
indication. This without the need of complicated
and expensive measurement tools like
LaserVibrometers or Acoustic Holography systems.
The Scan & Listen device is used to
make the PU Microflown signals easily audible. This is very useful for fast
trouble shooting and e.g. mode finding, machine monitoring. The sound pressure
or the particle velocity is equalized, amplified with adjustable gain and put on
the headphone output. This just with a small and portable device. The Scan
& Listen device is powered with a 9V battery or 12V-18VDC power supply. The gain
potentiometer is also used to switch on the device. When you listen with sound pressure it is almost
impossible to just scan and listen an object for hotspot finding or quick modes finding.
Big benifit is that also instationary sources like squeak & rattle easily can be found wich is
impossible with standard traditonal FFT analyasis!
This is caused due to the omnidirectionality of sound pressure. In
anechoic rooms you can reduce this effect but there
is an other problem still excist than and that is
reflection. Radiation of the object wil be reflected the
object itself and this you will also be measured. With
a Microflown you can listen to the directional
quantity acoustic particle velocity. Due to its
directionality you can just scan an object with the
probe, in manufacturing environment, and simply
listen to signal. With just listening you can easily find
acoustic hot spots on an object, discover modes or
do end of line control of your products.
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Applications 
