The Nova Model 43 (Class 1) and Model 44 (Class 2) are Integrating Sound Level Meters that are ideal for occupational noise assessments and checking for suitability of the available hearing protection.
The Nova Integrating Sound Level Meter meets the full requirements of the European noise at work regulations and the UK HSE Guidelines.
The regulations demand the use of at least a Class 2 integrating sound level meter meter. You can use the Class 1 as it is even more accurate.
You also need a suitable Calibrator to check the meter before and after a measurement session.
The Nova makes all the necessary measurements at the same time, over the whole measurement range.
As calibration is so important to the noise at work regulations, the meter will prompt you to complete a calibration check when you switch it on. Just place the Calibrator on the microphone and the meter will make any adjustments itself.
Average Sound Level - LAeq
The most important parameter for the EU and UK occupational noise regulations is the LAeq - average "A" weighted sound level).
As shown in the image on the right, the LAeq is the large number as this is the one you need the most.
Peak Sound Level - LCpeak
To assess any loud banging noise you should also measure the LCpeak. This is also shown on the main display above.
Hearing Protector Assessment - C-A
When assessing the suitability of hearing protection, the standard HML method. The (C - A) figure is used for this calculation and so is also displayed on the main noise at work screen.