Simplified meter

According to a study compiled by Chris Gilbert (MIOA) and Simon Bull (MIOA), 90% of all environmental noise measurement tasks can be completed using only three measurement parameters; LAeq (Equivalent Sound Level), L90 (Sound level exceeded for 90% of the time) and LAmax (Maximum Sound Pressure Level).

With this in mind, the SONUS E sound meter from Castle Group has been designed for straightforward operation. It has a single lead-acid battery lasting over a week and a total system weight of less than 5.5kg.

The SONUS E will measure down to 22dB and will give 2 parallel measurements, which is required in some environmental standards. The parameters measured include Leq, LE, Lmax, L10, L90 and one user defined Ln value and the data-logging is capable of taking a measurement every second as well as overall levels.