Unprotected measurement microphones are sensitive to environmental factors such as wind, rain and snow. This shortcoming has been eliminated by specially designed units that protect the microphone. G.R.A.S. offers two types; Outdoor microphones for permanent outdoor use that can withstand all weathers year after year. And environmental microphones designed for temporary outdoor use in terms of days or weeks.
Both types are available in two versions:
0° incidence for airport noise monitoring and 90° incidence for community and traffic noise monitoring.
All G.R.A.S. versions comply with the relevant international standards for monitoring noise.
Dyn range: 20 dB(A) to 156 dB
Sensitivity: 50 mV/Pa
The G.R.A.S. 41AM Outdoor Microphone System is for outdoor use whenever trouble-free acoustic measurements and, in particular, noise monitoring around airports are required.Learn More
Dyn response: 20 to 156
Sensitivity: 50 mV/PaG.R.A.S. 41CN Permanent Outdoor Microphone System for community noise Learn More