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Hamming
Hanning
Blackman
Fig 42, 43, 44, 45 show four types of window functions referring to a sine wave of
1KHz.
This is a good window for resolving frequencies
that are very close to the same value with
somewhat improved amplitude accuracy over the
rectangle window. It has a slightly better frequency
resolution than the Hanning selection.
Use Hamming for measuring sine, periodic, and
narrow band random noise. This window works on
transients or surges where the signal levels before
and after the event are significantly different.
This is a good window for amplitude accuracy but
less so for resolving frequencies.
Use Hanning for measuring sine, periodic, and
narrow band random noise. This window works on
transients or surges where the signal levels before
and after the event are significantly different.
This is the best window for measuring the
amplitude of frequencies but least useful for
resolving frequencies.
Use Blackman-Harris for measuring predominantly
single frequency waveforms to examine higher
order harmonics.
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V5.1 ‐ March 2010
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