[FieldTrip] Hann taper vs. single Slepian taper

[Ingrid Nieuwenhuis]

Dear David,

The Slepian tapers are sets of multiple (orthogonal) tapers, that only 
combined accomplish this "optimally maximized frequency resolution while 
minimizing leakage from distant frequencies". If you use only a single 
taper, the Slepian taper is suboptimal compared to the Hanning taper. 
I've attached some teaching slides I have with some background on 
multitapers.

Hope this helps,
Cheers,
Ingrid


On 12/16/2010 6:01 AM, David Groppe wrote:
> Hi Fieldtripians,
>     Could anyone explain to me when, if ever, it would be better to
> perform a DFT with a Hann taper vs. a single Slepian taper?  It was my
> understanding that Slepian tapers in general optimally maximized
> frequency resolution while minimizing leakage from distant
> frequencies.  However, a colleague of mine says he was told at a
> workshop at the Donders Institute that a Hann taper was better than a
> single Slepian taper (if you are only going to use one taper).
>         thanks for your help,
>              -David
>

-- 
Ingrid Nieuwenhuis PhD
Sleep and Neuroimaging Laboratory
Department of Psychology
University of California, Berkeley
California 94720-1650

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