All meters used for environmental noise monitoring are type approved. The highest
level of approval is Type 1. Whilst Type 2 meters are allowed by British Standard
4142, Type 1 meters are generally used.
All meters are officially calibrated at least once every one to two years. They are
also calibrated before and after each test on-site, to ensure that the calibration
is still correct. The calibrator used for this is itself calibrated each year.
Currently the noise meters owned, and used by Farm Energy Consulting, include: