Noise source location passes demo challenge

26th January 2016
Posted By : Mick Elliott
Noise source location passes demo challenge

The global pump manufacturer Grundfos has enhanced its noise source identification capabilities, with a system based on a microphone array containing 108 microphones and optical camera in the middle. Based in Denmark, Grundfos’ state-of-the-art laboratory carries out sound measurements to ensure its pump units are quiet enough for domestic use and industrial demands - and to locate any potential causes of reliability issues.

To improve its ability to locate very small noise sources during product development, the company approached Brüel & Kjær for a solution.

Grundfos set up a challenging test by using one of its well-functioning pumps and rigging it with two tiny, movable sound-sources.

During the test, Brüel & Kjær demonstrated how its complete noise source location system could identify the sources’ various frequencies and levels, producing a sound map that clearly visualised the sources, all in a short space of time.

The system will enable Grundfos to identify noise sources at a wide range of distances.

At medium-distances, the array uses beamforming technology, while - to pinpoint sources close up - it uses near-field holography methods.

Many conventional arrays cannot perform accurate measurements at both near and medium distances, but the unique geometry of this array makes it highly versatile.


You must be logged in to comment

Write a comment

No comments

Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Vietnam International Defense & Security Exhibition 2020
4th March 2020
Vietnam National Convention Center, Hanoi