The new 47AC Infrasound microphone set

At GRAS we are pleased to introduce the answer to the challenges of infrasound measurements: The 47AC 1/2” CCP Infra-Sound Microphone Set.

47AC frise

We now present the 47AC 1/2” CCP Infra-Sound Microphone Set as a standard product amongst the GRAS portfolio, as the result of working with JAXA to find a customized solution for the project “Drop test for Simplified Evaluation of Non-symmetrically Distributed sonic boom (D-SEND).

According to GRAS Director and Owner Per Rasmussen the partnership with JAXA has resulted in a thorough knowledge about the measurement challenges within infrasound: “Building upon these experiences we have now developed a standard product with the unique feature to measure at extremely low frequencies – as low as 0.09 Hz.”

The 47AC can be applied to infrasound measurements within different industries depending on your specific application from measurement of wind turbine noise to research at universities. 

Read the press realese here

Visit the campaign site here