From lkuznetsov@cern.ch Mon Jan 23 04:50:34 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!lkuznetsov From: lkuznetsov@cern.ch (Liam Kuznetsov) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan23.045034.4927@cern.ch> Date: Mon, 23 Jan 1995 04:50:34 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor. 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? -- Liam Kuznetsov "When every node is whole, the channel opens." Sun SparcStation 20 / NEXTSTEP 3.3 From hsato@unam.mx Mon Jan 23 15:34:34 1995 Path: ashpoly!cascade!mxgate!coyoacan!unam!hsato From: hsato@unam.mx (Heather Sato) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan23.153434.3520@unam.mx> Date: Mon, 23 Jan 1995 15:34:34 GMT References: <1995Jan23.045034.4927@cern.ch> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jan23.045034.4927@cern.ch>, lkuznetsov@cern.ch (Liam Kuznetsov) writes: > Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. > A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. -- === Heather Sato === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "Marcus is not one man."