eZ-Analyst
889691
Edit Menu 4-39
When eZ-Analyst was set with a limit of 6400 spectral lines, dual band processing offered the following
benefits:
•
A wider range of octave band data
with no increase in block size.
•
A much wider range of data, in
comparison to the data from the
Single Band mode.
•
The use of buffered data means that
High Band and Low Band data can be
captured simultaneously.
•
When compared to Single Band, the
Dual Band processing mode produces
more stable, precise data, at a lower
range of frequency.
eZ-Analyst versions 5 and higher have a spectral line limit of 25600. This larger
number of spectral lines allows coverage of the same frequency range using single
band mode.
Beginning with eZ-Analyst version 5.1.45, the selection for dual band octave is
grayed-out
. This is because single band mode should be used with the larger
number of spectral lines.
If you have configurations that use the dual band octave feature, then eZ-Analyst
versions 5.1.45 and higher will continue to load and run those configurations until
you re-save the configuration in single band mode.
Edit Menu > Configuration >
Octave Setup Tab:
Filter Panel
Weighting
: Used to select no filter or one of three to obtain a
dB to frequency contour
that
approximates that of the human ear. The contours (A, B, and C) match human
hearing at different sound intensities.
A Weighting
: filters out more bass than do the B and C weights. The A weight
is used to eliminate inaudible sounds that occur at low frequencies.
B Weighting
: used to approximate the ear for medium loud sounds.
C Weighting
: used to approximate the ear at very high sound levels.
Filter
:
Provides the means to select Analog Filter or Digital Filter.
Edit Menu > Configuration >
Octave Setup Tab:
Bar Type Panel
Line
:
Selecting “Line” sets the Octave Plot to appear in line format.
Solid
:
Selecting “Solid” sets the Octave Plot to appear filled-in solid, as
opposed to a line plot.
When you want to move cursors on octave plots it is best to
use the mouse and
drag-and-drop
action, instead of using the
frame annotation method.
