WHIS®stone Nördlingen

Last week our WHIS®stones were installed in Nördlingen in cooperation with the Augsburg State Building Authority. Many thanks for the great cooperation and the successful project. Measurements by [...]

Vreeland WHIS®barrier

We installed almost 300 meters WHIS®barrier for our client Provincie Utrecht. In this project we’ve combined our WHIS®top with a standard road safety barrier from Haitsma Beton.  


Since january 2021 we are the supplier of a state of the art multifunctional spherical microphone. The SonoCat can measure various things like SPL, absorption, sound intensity level and Sound [...]

Noise diffraction reduces traffic noise

From Noise news international 26 March 2020  In the last edition of Noise News International, published by Institute of Noise Control Engineering – USA, Ysbrand Wijnant had the opportunity [...]