From kgonzalez@earthlink.net Wed Oct 02 03:32:24 1996 Path: ashpoly!cascade!bigsur!earthlink!kgonzalez From: kgonzalez@earthlink.net (Kirsty González) Newsgroups: comp.dsp Subject: Data: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1996Oct02.033224.5618@earthlink.net> Date: Wed, 02 Oct 1996 03:32:24 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 11 Don't use rectangular or Bartlett windows if you want reliable PSD estimates around 14 Hz. A standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier. A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor. What sampling rates are people using for their vinyl rips? 44.1 kHz or 48 kHz DAT? -- Kirsty González "There are 14 nodes and only 10 countries. Count again." Decstation 5000/200 / FreeBSD 2.1 From bgarcia@illinois.edu Thu Oct 03 08:39:24 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!bgarcia From: bgarcia@illinois.edu (Bastien García) Newsgroups: comp.dsp Subject: Re: Data: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1996Oct03.083924.7458@illinois.edu> Date: Thu, 03 Oct 1996 08:39:24 GMT References: <1996Oct02.033224.5618@earthlink.net> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Oct02.033224.5618@earthlink.net>, kgonzalez@earthlink.net (Kirsty González) writes: > Don't use rectangular or Bartlett windows if you want reliable PSD estimates around 14 Hz. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Bastien García Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------