GRAS was founded in 1994 by Gunnar Rasmussen and is a 100% privately owned company.was founded in 1994 by Gunnar Rasmussen and is a 100% privately owned company.The company has concentrated its efforts and expertise on the development and production of front-end acoustic products. This includes in principle all products necessary for the precise and reliable measurement, and recording of acoustic signals, from the transducer to the input of the A/D converter. The main line of instrumentation includes a broad range of standard measurement microphones and preamplifiers, all designed and manufactured in accordance with international standards.