Eclipse CD7200 mkII Reference Manual page 115

How to operate the Sound Adjustment Mode
About parametric EQ
A variety of materials are used inside a vehicle to manufacture the seats and windows, and because
these materials absorb and reflect sound in different ways, the parametric equalizer lets you adjust
the peaks and dips of the frequency characteristics inside the vehicle to compensate for this.
H;9
h
J
A~
Peak
[Sound pressure] / ..... :-
(\I)
~/
V
·········--Oip
Low
Low [Frequency] High
An "equalizer" is a function that corrects these peaks and dips in order to flatten the frequency
characteristics. However with a normal graphic equalizer, the median frequency and the Q
(sharpness and band width) are fixed, so that when neighboring bands are corrected, there is a limit
to the amount by which distortion in the peak and dip characteristics can be corrected. A "parametric
equalizer" lets you adjust the median frequency, Q (sharpness and band width) and gain to variable
levels, so that you can make fine adjustments to spot areas of the frequency band.
[Parametric equalizer characteristics]
1.Median frequency can be varied.
High
[Sound pressure]
Low
2.Gain can be varied.
High
[Sound pressure)
Low
[Frequency] High
•
Low
-t---------
Low [Frequency) High
3.Q (sharpness/band width) can be varied.
High
[Sound pressure]
Low
-t-------:::~---
Low [Frequency] High
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