Notch filter

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jperkin2

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Joined 2008
A notch filter is just the opposite of a band-pass filter. A band-pass filter would pass a certain range of frequencies (all the frequencies inside the band), while it would cut out all the others. A notch filter cuts out a certain band of frequencies (all the frequencies inside the notch) and passes everything else.
 
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godless

Member
Joined 2005
jperkin2 said:
A notch filter is just the opposite of a band-pass filter. A band-pass filter would pass a certain range of frequencies (all the frequencies inside the band), while it would cut out all the others. A notch filter cuts out a certain band of frequencies (all the frequencies inside the notch) and passes everything else.
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I see, do you happen to know which frequencies BG is cutting out with the notch filter they are using in the RD40?
 
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kstrain

Member
Joined 2006
from BG data sheet

The RD series drivers should be used with a notch filter which equalizes a natural frontal cavity resonance.This peak is pronounced in the 5 kHz area on-axis, with a diminishing peak further off-axis.

Sounds undesirable.

Ken

google bg rd40 notch filter
 
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