From amoreau@cam.ac.uk Fri Mar 03 15:11:04 1995 Path: ashpoly!cascade!bigsur!cam!amoreau From: amoreau@cam.ac.uk (Anja Moreau) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Mar03.151104.5685@cam.ac.uk> Date: Fri, 03 Mar 1995 15:11:04 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 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. A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor. MATLAB script available upon request via email. -- Anja Moreau *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From lbrennan@clari.net Sun Mar 05 11:16:04 1995 Path: ashpoly!cascade!bigsur!clari!lbrennan From: lbrennan@clari.net (Lucia Brennan) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Mar05.111604.8437@clari.net> Date: Sun, 05 Mar 1995 11:16:04 GMT References: <1995Mar03.151104.5685@cam.ac.uk> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Mar03.151104.5685@cam.ac.uk>, amoreau@cam.ac.uk (Anja Moreau) writes: > 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. 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! -- Lucia Brennan Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From sandersson@kth.se Tue Mar 07 05:12:04 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!sandersson From: sandersson@kth.se (Sergei Andersson) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Mar07.051204.9139@kth.se> Date: Tue, 07 Mar 1995 05:12:04 GMT References: <1995Mar03.151104.5685@cam.ac.uk> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Mar03.151104.5685@cam.ac.uk>, amoreau@cam.ac.uk (Anja Moreau) 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. -- Sergei Andersson *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From nlee@uni-hamburg.de Tue Mar 07 10:45:04 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!nlee From: nlee@uni-hamburg.de (Natalia Lee) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Mar07.104504.5109@uni-hamburg.de> Date: Tue, 07 Mar 1995 10:45:04 GMT References: <1995Mar03.151104.5685@cam.ac.uk> <1995Mar07.051204.9139@kth.se> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Mar07.051204.9139@kth.se>, sandersson@kth.se (Sergei Andersson) writes: > Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. -- === Natalia Lee === Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik "Extraordinary claims require extraordinary spectra."