Measurement Computing eZ-PostView rev.2.0 - Manual (Page 103)

eZ-Analyst 969795 Edit Menu 4-25
Octave Band Plot from Dual Band Processing
Dual Band processing provides 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.
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.