The new 47AC infrasound microphone set from G.R.A.S.
G.R.A.S. are pioneers when it comes to infrasound measurements. After having worked with a number of partners we have now developed a solution for the market and are introducing the 47AC microphone set.
The G.R.A.S. 47AC1/2" Infra-Sound Microphone Set is a CCP free-field microphone set, allowing to measure frequencies as low as 0.09 Hz.