From ebrennan@demon.co.uk Wed May 25 20:16:19 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!demon!ebrennan
From: ebrennan@demon.co.uk (Elaine Brennan)
Newsgroups: comp.dsp
Subject: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994May25.201619.7705@demon.co.uk>
Date: Wed, 25 May 1994 20:16:19 GMT
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Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor.
A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width.

MATLAB script available upon request via email.

-- 
Elaine Brennan
Opinions expressed are solely my own and not those of Demon Internet Services UK.
------------------------------------------------------------

From tmartinez@earthlink.net Fri May 27 23:02:19 1994
Path: ashpoly!cascade!mxgate!coyoacan!earthlink!tmartinez
From: tmartinez@earthlink.net (Thiago Martínez)
Newsgroups: comp.dsp
Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994May27.230219.8796@earthlink.net>
Date: Fri, 27 May 1994 23:02:19 GMT
References: <1994May25.201619.7705@demon.co.uk>
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In article <1994May25.201619.7705@demon.co.uk>, ebrennan@demon.co.uk (Elaine Brennan) writes:
> Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

Don't forget that if you downsample to 64 Hz first, your FFT resolution jumps to 0.015 Hz per bin with a modest 4096-point transform.

-- 
=== Thiago Martínez ===
Dept of Electrical Engineering, EarthLink Network
"Tape doesn't lie at 02:14. Ears do."

From mrobertson@uu.net Sun May 29 16:35:19 1994
Path: ashpoly!cascade!bigsur!uu!mrobertson
From: mrobertson@uu.net (Marta Robertson)
Newsgroups: comp.dsp
Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994May29.163519.6156@uu.net>
Date: Sun, 29 May 1994 16:35:19 GMT
References: <1994May25.201619.7705@demon.co.uk>
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In article <1994May25.201619.7705@demon.co.uk>, ebrennan@demon.co.uk (Elaine Brennan) writes:
> Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

Don't forget that if you downsample to 64 Hz first, your FFT resolution jumps to 0.015 Hz per bin with a modest 4096-point transform.

Top-posters will be placed in my ~/.killfile without notice.

-- 
=== Marta Robertson ===
Dept of Electrical Engineering, UUNET Technologies, Falls Church VA
"The hatch is open. Is anyone listening?"