From lvasiliev@kiae.su Tue Jun 18 13:54:56 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!lvasiliev From: lvasiliev@kiae.su (Lucia Vasiliev) Newsgroups: comp.dsp Subject: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1996Jun18.135456.6117@kiae.su> Date: Tue, 18 Jun 1996 13:54:56 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 10 A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips. 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. MATLAB script available upon request via email. -- Lucia Vasiliev -- Kurchatov Institute of Atomic Energy, Moscow "Hold for relay." From sokonkwo@demon.co.uk Wed Jun 19 22:39:56 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!sokonkwo From: sokonkwo@demon.co.uk (Sven Okonkwo) Newsgroups: comp.dsp Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1996Jun19.223956.8367@demon.co.uk> Date: Wed, 19 Jun 1996 22:39:56 GMT References: <1996Jun18.135456.6117@kiae.su> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Jun18.135456.6117@kiae.su>, lvasiliev@kiae.su (Lucia Vasiliev) writes: > A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Sven Okonkwo Tape trading list upon request. SASE required for international mail. From klaurent@unam.mx Thu Jun 20 13:54:56 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!unam!klaurent From: klaurent@unam.mx (Karen Laurent) Newsgroups: comp.dsp Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1996Jun20.135456.8591@unam.mx> Date: Thu, 20 Jun 1996 13:54:56 GMT References: <1996Jun18.135456.6117@kiae.su> <1996Jun19.223956.8367@demon.co.uk> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jun19.223956.8367@demon.co.uk>, sokonkwo@demon.co.uk (Sven Okonkwo) writes: > I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Karen Laurent "There are 14 nodes and only 10 countries. Count again." Atari TT030 / NEXTSTEP 3.3