G.R.A.S. Sound & Vibration A/S is a family-owned company. G.R.A.S. develops and manufactures the broadest range of acoustic sensors and accessories. We are innovative and work in close cooperation with our customers and partners. In the market we are known for high quality, flexibility and service. Our customer segments are mainly within the automotive and aerospace industry, consumer electronics and audiology as well as monitoring of airport and community noise. Our customers are global and we export to more than 40 countries through our own sales offices and distributors. measurement microphones, standard & special, acoustic measurement equipment, preamplifiers, power modules, sound power hemispheres, ear simulators, artificial ears, mouth simulators, KEMAR head & torso simulators, signal conditioning