Products
Microphones
Measurement microphones are available in many types covering various frequency ranges, dynamic ranges and application situations.
Link to GRAS Website: Measurement microphone set
GRAS
Manufactures state-of-the-art measurement microphones and related equipment to industries where acoustic measuring accuracy and repeatability is of utmost importance.
Externally Polarized Microphones:
These microphones are used with standard preamplifiers, which has a 7-pin LEMO connector. The preamplifier must be connected to a power module or an analyzer input which can supply the preamplifier with power as well as 200 V polarization. If you conduct very critical measurements we recommend an externally polarized microphone which is the most accurate and stable.
Link to GRAS Website: Microphone sets with traditional power supply (LEMO)
Pre-polarized Microphones:
These microphones are used typically with CCP (Constant Current Power) preamplifiers. Prepolarized microphones must be connected to an input stage for CCP transducers or be powered by a CCP supply.
Link to GRAS Website: Microphone sets with constant current power (CCP)
