Spider DSA User’s Manual
244
the time signals cannot be arbitrarily changed. It is always set internally by the
system based on the analysis frequency range.
RMS trace of weighted level, time averaged level or sound exposure
The Spider records an RMS trace of the sound level. The user must choose
between the time weighted level, L
AF
, the equivalent time averaged level, L
AEQ,
or
sound exposure level, L
AE
. Only one can be recorded at a time.
Histogram of Time Weighting
The Spider also records a signal containing a histogram of the dB values of the
time weighted signal. This signal is used to compute the L
n
data.
Creating Acoustic Tests
EDM runs in the context of a loaded test project. A test project consists of an
input and output configuration, analysis parameters, and acquired data. A new
test is created by selecting New Test in the Test menu. This opens the New Test
Wizard.
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