Yeah, those sure look like the same sonogram with just a little damping on the left one. I doubt you'd get such precisely matching features even from the same bird chirping twice! In fact I just analyzed the calls/claps on Earl's page above. Even the two chirps from the same bird have more variation than the Lubman sonogram...
Which isn't to say the basic idea is wrong, but that Lubman sonogram isn't the real deal. Hopefully just a mistake. best, douglas On Mon, Feb 17, 2014 at 10:58 AM, Ross Bencina <rossb-li...@audiomulch.com>wrote: > > On 18/02/2014 2:37 AM, Earl Vickers wrote: > >> http://www.ocasa.org/MayanPyramid.htm >> > > Great story. > > But something seems fishy with these spectrograms: > > http://www.ocasa.org/MayanPyramid2.htm > > The left and right images look a little too similar don't you think? > > Ross. > > -- > dupswapdrop -- the music-dsp mailing list and website: > subscription info, FAQ, source code archive, list archive, book reviews, > dsp links > http://music.columbia.edu/cmc/music-dsp > http://music.columbia.edu/mailman/listinfo/music-dsp > -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp
