This precision grade sound level meter is particularly suitable
for environmental noise measurement. With its Type
1 performance, removable microphone stem (can take a microphone
extension cable), data storage and automatic timing functions it
meets most environmental applications. It is also perfectly suited
for the professional acoustician involved in noise at work applications.
Environmental and Community Noise Surveys
The Model 91 meter is ideal for general environmental and community
noise surveys and assessments. The ability to measure down to 21
dB(A) makes it suitable for locations with low ambient noise levels.
For this type of survey it is often necessary to make repeating,
timed measurements (e.g. measure every 15 minutes). The Model 91
can be set to make such measurements, automatically restarting
and storing parameters such as LAeq, L90, Lmax, and many others.
It also stores the Leq every second, giving a graph of the noise
level over time for further reporting and analysis.
Occupational Noise at Work Surveys
The Model 91 is a Class 1 Integrating Sound Level Meter and so is
more than adequate for most occupational noise measurements. For
OSHA type measurements please see our OSHA Sound