Scan & paint

Sound source localization is an important topic in the working field of sound & vibration, from the product development stage to the end off line control of products. Microflowns Scan & Paint is a new fast tool to visualize stationary sound fields in a broad frequency range. The system is a superb engineering tool for troubleshooting or benchmarking all type of object on the spot. In practice, there are many cases where anechoic conditions are not applicable, for instance in an industrial manufacturing environment, an engine bay or car interior. PU probes are not highly  affected by background noise or reflections and are suitable in situations with a high sound pressure over sound intensity ratio. PU probes allow direct measurement of sound pressure, particle velocity, sound intensity, sound power and the acoustic impedance. The Scan & Paint method is very simple; the surface is scanned with one PU probe while a camera is positioned toward the surface to film the scanning. The recorded video and audio data are automatically synchronized by the software and the measurement are directly ready to be processed. In the post-processing for each frame of the video the position of the probe is extracted. The auto-tracking function in the software enables to automatically recognize the probe and its position by the color. At each measurement point the particle velocity, sound intensity and sound pressure are calculated from the relative time block of the audio data. A high resolution sound color map is produced as result. A reference sensor can be added to have the relative phase correlation of the surface velocities.Typically the measurement and processing time will only take a few minutes in total. The software has multiple more features as for example: display in different octave bands, frequency filtered local position audio playback, spectrum, spectrogram, sound power calculation and many more.


  • Frequency range 20Hz - 10kHz
  • Fast method; short measurement and processing time
  • Low suscepebility to background noise and reflections
  • No need for anechoic room or anechoic conditions
  • Automatic synchronization of the measurements with the captured video data
  • High resolution mapping of:
    • Sound pressure
    • Particle velocity
    • Sound intensity
  • Absorption ( applicable in combination with the in-situ absorption setup )
  • Sound Power calculation
  • Frequency filtered playback of audio
  • Single sensor solution


Sound of Numbers Odeon Pemard

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