As the P33 can be configured in so many different ways, it is suitable for almost any noise measurement application. For general noise surveys, the meter operates in "broadband" mode, providing you with the LAeq, which is usually the most important parameter. However, at the same time it can store other parameters, such as the C-weighted Leq (LCeq), Peak, Fast, Slow and Impulse weighted Sound Level and the statistical Ln (L90, etc.) values.
When you need to make a frequency analysis, the switch the meter to Octave Band mode or, for more detail, 1/3 Octave Band Mode. In this setting it can measure the average spectrum over a period of time, or can even store the spectrum every 1/8 second (125 ms). These measurements can be used for assessing machinery noise (tonal content), environmental surveys and hearing protection assessments.
The P33, either in Class 1 or Class 2 form is more than adequate for any occupational noise survey. Most occupational noise regulations state that a Class 2 meter is adequate (P33-2) but of course you can use the more accurate Class 1. The real-time octave band measurements can be used for checking the suitability of hearing protectors. For other meters that are suitable for this type of application please visit our Noise at Work page.
You do not need 1/3 Octave Band Filters for a noise at work survey but having them available means you are equipped for assessing machinery (bearing noise, etc.), environmental, boundary and any other type of noise measurement that you may need to carry out. If you only need Octave Bands then please visit the Pulsar Nova Real Time Octave Band Analyzer page.
The P33 Analyzer comes complete with the environmental noise measurement parameters built in. It can measure the periodic LAeq and L90, as required by many standards such BS4142. It also stores many other parameters, some of which are needed now and some of which may be needed in future standards.
When tonal noise may be an issue for a factory, wind farm or wind turbine, the meter can measure the 1/3 octave band spectrum (or a series of spectra from 125ms upwards) so that you can assess the problem with accuracy.
The Outdoor Noise Measurement Kits equip the P33 so that it can be left unattended in poor weather conditions for longer term noise surveys.