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Since the establishment in 1994, G.R.A.S. have been 100% dedicated to developing and manufacturing high-quality measurement microphones and related acoustic equipment. 

founded by the Danish acoustics pioneer Gunnar Rasmussen who for more than 60 years has contributed to the world of sound and vibration with his unique ideas and designs. Many variants have been made available over the
years; all based on Gunnar Rasmussen’s original 1” pressure microphone design.

G.R.A.S. main line of product includes: