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0

P

rincipleAliasR

ange

fs

2

fs 2fs

3fs

2

Folded strip is the analog

frequency axisf

f0

fs ! f0 fs + f0 2fs ! f0

fs = sampling rate

Sampling and Aliasing

Alias

frequencies liealong horizontallines

Zone 1 Zone 2 Zone 3 Zone 4

Also see pages 4-13, before and after, in the course notes

This is what

you hear

Example: fs = 8000 Hz, fs 2 = 4000 Hz

f0 = 3000 has aliases at 5000, 11000, 13000, ...