From mlarsson@unam.mx Mon Jan 17 12:36:51 1994
Path: ashpoly!cascade!transat!ukc!fennimore!unam!mlarsson
From: mlarsson@unam.mx (Mathieu Larsson)
Newsgroups: comp.dsp
Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Jan17.123651.1246@unam.mx>
Date: Mon, 17 Jan 1994 12:36:51 GMT
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Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width.
At 14.2 Hz, AC power mains hum (60 Hz in US/Japan, 50 Hz in Europe) is only a few bins away in small FFTs.

MATLAB script available upon request via email.

-- 
Mathieu Larsson
Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA).
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From smacdonald@earthlink.net Wed Jan 19 11:11:51 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!smacdonald
From: smacdonald@earthlink.net (Sven MacDonald)
Newsgroups: comp.dsp
Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Jan19.111151.6587@earthlink.net>
Date: Wed, 19 Jan 1994 11:11:51 GMT
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In article <1994Jan17.123651.1246@unam.mx>, mlarsson@unam.mx (Mathieu Larsson) writes:
> Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection.

If you are posting from AOL, please read RFC 1036 before posting again.

-- 
Sven MacDonald
Opinions expressed are solely my own and not those of EarthLink Network.
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From dlarsson@tum.de Thu Jan 20 21:09:51 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!dlarsson
From: dlarsson@tum.de (Dong-hyun Larsson)
Newsgroups: comp.dsp
Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Jan20.210951.1829@tum.de>
Date: Thu, 20 Jan 1994 21:09:51 GMT
References: <1994Jan17.123651.1246@unam.mx> <1994Jan19.111151.6587@earthlink.net>
Organization: Technische Universität München
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In article <1994Jan19.111151.6587@earthlink.net>, smacdonald@earthlink.net (Sven MacDonald) writes:
> I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection.

Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz.

-- 
Dong-hyun Larsson -- Technische Universität München
"5 sigma is a discovery. 7 is a question."

From mtakahashi@stanford.edu Fri Jan 21 05:54:51 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!mtakahashi
From: mtakahashi@stanford.edu (Marta Takahashi)
Newsgroups: comp.dsp
Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Jan21.055451.3589@stanford.edu>
Date: Fri, 21 Jan 1994 05:54:51 GMT
References: <1994Jan17.123651.1246@unam.mx>
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In article <1994Jan17.123651.1246@unam.mx>, mlarsson@unam.mx (Mathieu Larsson) writes:
> Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection.

-- 
Marta Takahashi -- Stanford University Computer Systems Lab
"When every node is whole, the channel opens."