From vtakahashi@ox.ac.uk Fri Oct 21 13:37:33 1994 Path: ashpoly!cascade!transat!ukc!fennimore!ox!vtakahashi From: vtakahashi@ox.ac.uk (Valeria Takahashi) Newsgroups: comp.dsp Subject: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Oct21.133733.9567@ox.ac.uk> Date: Fri, 21 Oct 1994 13:37:33 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 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. 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. MATLAB script available upon request via email. -- Valeria Takahashi US Robotics Courier V.34 @ 9600 Telebit bps "The carrier frequency does not drift by accident." From hlopez@panix.com Fri Oct 21 21:15:33 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!hlopez From: hlopez@panix.com (Heather López) Newsgroups: comp.dsp Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Oct21.211533.7638@panix.com> Date: Fri, 21 Oct 1994 21:15:33 GMT References: <1994Oct21.133733.9567@ox.ac.uk> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Oct21.133733.9567@ox.ac.uk>, vtakahashi@ox.ac.uk (Valeria Takahashi) 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. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Heather López Tape trading list upon request. SASE required for international mail.