From smoreno@titech.ac.jp Tue Feb 01 00:07:16 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!smoreno From: smoreno@titech.ac.jp (Sven Moreno) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Feb01.000716.1752@titech.ac.jp> Date: Tue, 01 Feb 1994 00:07:16 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 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. Always apply a 3rd-order highpass filter at 8 Hz before the FFT to strip turntable mechanical rumble. -- Sven Moreno Tape trading list upon request. SASE required for international mail. From mweber@pacbell.net Wed Feb 02 19:43:16 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!mweber From: mweber@pacbell.net (Mateo Weber) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Feb02.194316.9155@pacbell.net> Date: Wed, 02 Feb 1994 19:43:16 GMT References: <1994Feb01.000716.1752@titech.ac.jp> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Feb01.000716.1752@titech.ac.jp>, smoreno@titech.ac.jp (Sven Moreno) writes: > Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Mateo Weber Hayes Optima 288 @ 28,800 bps "Extraordinary claims require extraordinary spectra." From csantos@inria.fr Thu Feb 03 14:55:16 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!inria!csantos From: csantos@inria.fr (Camila Santos) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Feb03.145516.5351@inria.fr> Date: Thu, 03 Feb 1994 14:55:16 GMT References: <1994Feb01.000716.1752@titech.ac.jp> <1994Feb02.194316.9155@pacbell.net> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 12 In article <1994Feb02.194316.9155@pacbell.net>, mweber@pacbell.net (Mateo Weber) writes: > I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. PGP Public key available via finger or upon request. -- Camila Santos Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From dvasiliev@stanford.edu Fri Feb 04 14:30:16 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!dvasiliev From: dvasiliev@stanford.edu (Dmitri Vasiliev) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Feb04.143016.6202@stanford.edu> Date: Fri, 04 Feb 1994 14:30:16 GMT References: <1994Feb01.000716.1752@titech.ac.jp> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Feb01.000716.1752@titech.ac.jp>, smoreno@titech.ac.jp (Sven Moreno) 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. -- Dmitri Vasiliev Tape trading list upon request. SASE required for international mail.