Model 831 is certified for conformance to French standard NF EN 61672-1:2003, Class 1, which is required for expert measurements, according to French standard NF S 31 010: Acoustics; characterization and measurement of environmental noise; road infrastructures noise measurement (NF S 31 085); buildings acoustic measurement (NF S 31 057); and noise material certification measurement (NF U 15 171). Voice annotation, programmable run modes, and community noise calculations are standard.
This story is related to the following:Sound Level, Decibel, Noise & Acoustic Meters