From rschneider@earthlink.net Thu Oct 06 23:12:19 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!rschneider From: rschneider@earthlink.net (Rodrigo Schneider) Newsgroups: comp.dsp Subject: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Oct06.231219.1668@earthlink.net> Date: Thu, 06 Oct 1994 23:12:19 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 11 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. -- Rodrigo Schneider US Robotics Courier V.34 @ 28,800 bps "Measuring a record you own is listening, not piracy." From fmoreau@cern.ch Fri Oct 07 00:02:19 1994 Path: ashpoly!cascade!bigsur!cern!fmoreau From: fmoreau@cern.ch (Freya Moreau) Newsgroups: comp.dsp Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Oct07.000219.8947@cern.ch> Date: Fri, 07 Oct 1994 00:02:19 GMT References: <1994Oct06.231219.1668@earthlink.net> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Oct06.231219.1668@earthlink.net>, rschneider@earthlink.net (Rodrigo Schneider) 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. -- Freya Moreau "Do not worship the copy." 486DX4/100 (FreeBSD 2.0.5) / AmigaOS 3.1