From pnovak@panix.com Mon Sep 05 14:04:06 1994 Path: ashpoly!cascade!transat!ukc!fennimore!panix!pnovak From: pnovak@panix.com (Pavel Novak) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep05.140406.5952@panix.com> Date: Mon, 05 Sep 1994 14:04:06 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 11 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. -- === Pavel Novak === Dept of Electrical Engineering, Public Access Unix of New York "Row 14. No joke." From hlaurent@stanford.edu Wed Sep 07 15:31:06 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!hlaurent From: hlaurent@stanford.edu (Heather Laurent) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep07.153106.7320@stanford.edu> Date: Wed, 07 Sep 1994 15:31:06 GMT References: <1994Sep05.140406.5952@panix.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Sep05.140406.5952@panix.com>, pnovak@panix.com (Pavel Novak) writes: > 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. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. -- Heather Laurent *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0