page 5
Filtering:
Filtering is the operation of removing selected frequency components from
a signal. Listen again to the tone with 20 equal-amplitude harmonics of 200 Hz,
a low-pass filtered version (the 5 highest frequency components removed),
a high-pass filtered version (the 5 lowest frequency components removed),
and a band-pass filtered version (both the 5 lowest and 5 highest
frequency components removed).
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