The Microflown is the world’s first and only MEMS technology based sensor that can measure the acoustic particle velocity. By measuring the temperature difference in the cross section of two extremely thin platinum wires placed in parallel, this extremely fast mass flow sensor is capable of monitoring the movement of air particles in both the (scalar) value sound pressure and the (vector) value acoustic particle velocity.
The Microflown sensor has been used in the field of sound and vibration testing for:
- Sound source localisation
- Airborne transfer path analysis and panel contribution analysis
- In situ determination of materials acoustic properties
- Non contact vibration measurements / modal analysis
- Micropore leak-testing
Microflown’s sensors and technology is used in wide range of industries including the aerospace, automotive, appliances, manufacturing industries and defense sectors.
Microflowns Scan & Paint is designed to rapidly visualize a stationary object sound fields in a broad frequency range to localize the various sound sources. The system operates with one PU probe scanning the surface with a camera positioned on the surface to film the scanning. As the probe moves, each measurement point audio data is calculated while the camera records the position of the probe. The Audio and Video inputs are then synchonized rapidly by the system to create high resolution map color map of sound intensity of the area for acoustic analysis of the object.
The system records the sound pressure, sound intensity, sound power, particle velocity and the acoustic impedance which can filter and localize different positions. At each point, the system can produce a localized audio playback, spectrum, spectrogram, sound power calculation and many more to understand the vibration and acoustic disturbance. This makes the system a superb engineering tool for troubleshooting or benchmarking any stationary object to reduce distortion and eliminate unnecessary noise.
Human ears only hear sound pressure and cannot hear particle velocity to detect subtle acoustic leakages. With Scan & Listen, the user can hear the sound of particle velocity and its vector value to detect acoustic leakages quickly and accurately.
Designed with the same principles of Scan & Print, Scan & Listen is designed to be a practical and portable system to detect sound sources in practical environments. Consisting of the module, microflown sensor and headphone, Scan & Listen is light, simple and handheld for listening to noise sources even with background noise and reflections. Even in conditions with non-stationary sources like squeak & rattle noise, Scan & Listen can accurately locate acoustic leakages and providing a simple yet fast solution in localizing sound sources.
The Microflown PU-based Near Field Acoustic Camera is a rapid and accurate system for sound source localization. Designed to be portable, the device can be handheld to do scanning and measuring a small area for sound source localization or acoustic leakages.
Unlike tradition techniques of using a sound pressure microphone and a PU sound intensity probe, the Near Field Acoustic Camera provides an integrated solution.It measures the particle velocity directly cutting out complex computation steps and from the data creates and records an accurate particle velocity map. Data like other Microflown products is projected visually in a high resolution map by the supporting acoustic camera software for analysis and comparison.
Easy to use and portable, Near Field Acoustic camera is used for automobiles, aircraft, large machinery, medical equipment and consumer goods for prototyping, testing and quality control.