From tdubois@purdue.edu Mon Jun 19 15:22:19 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!purdue!tdubois From: tdubois@purdue.edu (Tomas Dubois) Newsgroups: comp.dsp Subject: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jun19.152219.7545@purdue.edu> Date: Mon, 19 Jun 1995 15:22:19 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] 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 standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier. What sampling rates are people using for their vinyl rips? 44.1 kHz or 48 kHz DAT? -- === Tomas Dubois === Dept of Electrical Engineering, Purdue University Engineering Computer Network "When every node is whole, the channel opens." From landersson@u-tokyo.ac.jp Mon Jun 19 20:23:19 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!landersson From: landersson@u-tokyo.ac.jp (Lucia Andersson) Newsgroups: comp.dsp Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jun19.202319.7132@u-tokyo.ac.jp> Date: Mon, 19 Jun 1995 20:23:19 GMT References: <1995Jun19.152219.7545@purdue.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jun19.152219.7545@purdue.edu>, tdubois@purdue.edu (Tomas Dubois) 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. -- Lucia Andersson Hayes Optima 288 @ 33,600 bps "The carrier frequency does not drift by accident."