Noise Dosimeter; Figure 1-2: Illustration Of How The Dosimeter Operates And Processes - 3M Edge eg5 User Manual

Overview
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Noise dosimeter

Noise dosimeter
What is a noise dosimeter and how does it compute measurements?
Essentially, a noise dosimeter is composed of the following: a microphone with a preamplifier, a
weighted network, fast or slow response time, an internal clock, calculator, and memory to store logged
data.
The illustration below is a diagram of a basic noise dosimeter. The microphone will, when exposed to a
sound pressure, generate an electrical signal. The signal will be increased by a preamplifier, and then is
regulated to an applicable level by the range control (dB range). The signal then goes through a filter set
or weighting system. The next circuit is the response circuit, which controls the dampening of the
readout. The response choices are typically Slow or Fast. Finally, the results will display on the
dosimeter screen.
For computation and storage, the clock tracks the sampling time. Dosimeters record how long sound
levels exceeded a set upper limit. The calculator computes an L
memory stores all times, calculations, and measurements.
For post-processing, DMS is used to view and analyze your measurement results with the option to view
and/or print reports.
Mic &
Range control
Preamp
(70-140dB)
Clock Calculator

Figure 1-2: Illustration of how the dosimeter operates and processes

C
A
Apply filters
(A or C weighting)
File storage
system
, a dose, a TWA, and other data. The
AVG
Fast/Slow
Measurement
Response
results on the Edge
DMS – Manage setup and
create graphs, charts and reports