5-44
5-22 Notch Filter
Ope
rati
n
g Func
tions
5
A notch filter is a filter that eliminates a designated component of a frequency.
A notch filter is used to eliminate resonance occurring in a machine.
Depth = Fc/fw
Cut-off frequency Fc
Frequency Hz
Width fw
fw
0 db
-3 db
Notch Filter 1
Notch Filter 2
Characteristics
after filtering
Machine resonance
Notch Filter