Norsonic NOR150, Instruction Manual

Page: 142 / 216

126 Chapter 21
Sound Intensity
Figure 21.53 - Simple
view for a segment. Figure 21.54 - Simple
view and warning panel
for a segment.
Reviewing the measurements
Measurements using the ISO 9614-2 requires evaluation
of field indicators in addition to the sound power and
sound intensity. The indicators are presented in separate
views in the Nor150. Below is an overview of the data
presented in the different scopes.
HINT: The concept of scopes is discussed in section
“Introducing the surface scopes” on page 118 .
Segment scope
The segment scope presents data for a single segment.
Thus, no graphical surface (scope view) is available in
this scope, and simple view is selected when tapping
into a segment.
Simple view
A graph is presented for sound pressure and either
sound intensity or sound power. Warnings are indicated
for each frequency band and the segment total. Toggle
between sound power and sound intensity using
the
FUNC
key. Press
INFO
to bring up the warning
window. Figure 21.53 and 21.54 shows the simple view
for a segment, with and without the warning panel.
Advanced view
Three different graphs are presented by toggling the
FUNC
key. The warning window is available for all
graphs by pressing the
INFO
button.
The first graph shows sound power, sound intensity
and sound pressure at the same time, as illustrated in
Figure 21.55.
The second graph displays dynamic capability along
with the field indicator FpI, as illustrated in Figure 21.56.
If two scans have been made on the segment, a third
graph is available. This graph shows the difference
(
∆
) functions generated based on the two scans as
illustrated in Figure 21.57.