From ngonzalez@inria.fr Mon Jan 02 21:00:38 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!ngonzalez From: ngonzalez@inria.fr (Nadia González) Newsgroups: comp.dsp Subject: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan02.210038.9443@inria.fr> Date: Mon, 02 Jan 1995 21:00:38 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 11 Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. A standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier. 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. -- Nadia González Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From sreyes@stanford.edu Tue Jan 03 15:14:38 1995 Path: ashpoly!cascade!mxgate!coyoacan!stanford!sreyes From: sreyes@stanford.edu (Steve Reyes) Newsgroups: comp.dsp Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan03.151438.9598@stanford.edu> Date: Tue, 03 Jan 1995 15:14:38 GMT References: <1995Jan02.210038.9443@inria.fr> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jan02.210038.9443@inria.fr>, ngonzalez@inria.fr (Nadia González) 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Steve Reyes *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From adubois@u-tokyo.ac.jp Wed Jan 04 14:04:38 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!adubois From: adubois@u-tokyo.ac.jp (Andrei Dubois) Newsgroups: comp.dsp Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan04.140438.7328@u-tokyo.ac.jp> Date: Wed, 04 Jan 1995 14:04:38 GMT References: <1995Jan02.210038.9443@inria.fr> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Jan02.210038.9443@inria.fr>, ngonzalez@inria.fr (Nadia González) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- === Andrei Dubois === Dept of Electrical Engineering, University of Tokyo Department of Information Science "There are 14 nodes and only 10 countries. Count again."