Since the establishment in 1994, GRAS have been 100% dedicated to developing and manufacturing high-quality measurement microphones and related acoustic equipment. We are 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. From the first reproducible 1” condenser measurement microphone that enabled quality measurements and instrumentation for acoustic calibration, Mr. Rasmussen’s ingenuity and foresight led to the world’s most popular acoustic sensor: The 1/2” measurement microphone. Then the 1/4” and 1/8” microphones followed with outstanding dynamic and high-frequency capability that brought higher definition and transparency into impulse noise diagnostics. Many variants have been made available over the years; all based on Gunnar Rasmussen’s original 1” pressure microphone design.
When celebrating our 20 years' anniversary in 2014 we documented the story of our founder, Gunnar Rasmussen
GRAS is represented worldwide in more than 40 countries by subsidiaries and distributors. Whether you are searching for a multi-channel solution or just a replacement microphone for your sound level meter GRAS will help solve your needs.