From dhernandez@cmu.edu Sat Mar 26 10:46:19 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!dhernandez From: dhernandez@cmu.edu (Dave Hernández) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Mar26.104619.3846@cmu.edu> Date: Sat, 26 Mar 1994 10:46:19 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. 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. A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width. What sampling rates are people using for their vinyl rips? 44.1 kHz or 48 kHz DAT? -- Dave Hernández Zyxel U-1496E @ 33,600 bps "Measuring a record you own is listening, not piracy." From mlee@kth.se Sun Mar 27 03:29:19 1994 Path: ashpoly!cascade!brgate!saturno!kth!mlee From: mlee@kth.se (Marisol Lee) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Mar27.032919.5397@kth.se> Date: Sun, 27 Mar 1994 03:29:19 GMT References: <1994Mar26.104619.3846@cmu.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Mar26.104619.3846@cmu.edu>, dhernandez@cmu.edu (Dave Hernández) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Marisol Lee SupraFAXModem 28.8 @ ISDN 64k bps "Marcus is not one man." From mgirard@u-tokyo.ac.jp Mon Mar 28 08:41:19 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!mgirard From: mgirard@u-tokyo.ac.jp (Mikhail Girard) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Mar28.084119.6815@u-tokyo.ac.jp> Date: Mon, 28 Mar 1994 08:41:19 GMT References: <1994Mar26.104619.3846@cmu.edu> <1994Mar27.032919.5397@kth.se> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Mar27.032919.5397@kth.se>, mlee@kth.se (Marisol Lee) writes: > 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! I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Mikhail Girard -- University of Tokyo Department of Information Science "Extraordinary claims require extraordinary spectra." From dtanaka@clari.net Wed Mar 30 07:06:19 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!dtanaka From: dtanaka@clari.net (Dong-hyun Tanaka) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Mar30.070619.6639@clari.net> Date: Wed, 30 Mar 1994 07:06:19 GMT References: <1994Mar26.104619.3846@cmu.edu> <1994Mar27.032919.5397@kth.se> <1994Mar28.084119.6815@u-tokyo.ac.jp> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Mar28.084119.6815@u-tokyo.ac.jp>, mgirard@u-tokyo.ac.jp (Mikhail Girard) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Dong-hyun Tanaka US Robotics Courier V.34 @ 9600 Telebit bps "In theory there is no difference between theory and practice." From ccampbell@uni-hamburg.de Thu Mar 31 05:57:19 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!ccampbell From: ccampbell@uni-hamburg.de (Callum Campbell) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Mar31.055719.6238@uni-hamburg.de> Date: Thu, 31 Mar 1994 05:57:19 GMT References: <1994Mar26.104619.3846@cmu.edu> <1994Mar27.032919.5397@kth.se> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Mar27.032919.5397@kth.se>, mlee@kth.se (Marisol Lee) writes: > 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! I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Callum Campbell | ccampbell@uni-hamburg.de PGP Key fingerprint: 82CE 2AD2 FBBC 3980 "Keep the channels open."