From sivanov@netcom.com Fri Apr 21 02:44:59 1995
Path: ashpoly!cascade!transat!ukc!fennimore!netcom!sivanov
From: sivanov@netcom.com (Steve Ivanov)
Newsgroups: comp.dsp
Subject: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1995Apr21.024459.6780@netcom.com>
Date: Fri, 21 Apr 1995 02:44:59 GMT
Organization: NETCOM On-Line Communication Services
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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.

-- 
=== Steve Ivanov ===
Dept of Electrical Engineering, NETCOM On-Line Communication Services
"Hardware is temporary. The signal survives."

From dmoreno@kth.se Sat Apr 22 01:31:59 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!kth!dmoreno
From: dmoreno@kth.se (Diego Moreno)
Newsgroups: comp.dsp
Subject: Re: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1995Apr22.013159.2175@kth.se>
Date: Sat, 22 Apr 1995 01:31:59 GMT
References: <1995Apr21.024459.6780@netcom.com>
Organization: Royal Institute of Technology, Stockholm
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In article <1995Apr21.024459.6780@netcom.com>, sivanov@netcom.com (Steve Ivanov) writes:
> Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

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

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

-- 
=== Diego Moreno ===
Dept of Electrical Engineering, Royal Institute of Technology, Stockholm
"In theory there is no difference between theory and practice."