On May 11, 2014, at 7:42 PM, Sampo Syreeni <de...@iki.fi> wrote: > On 2014-05-08, Nigel Redmon wrote: > >> The bottom line, I think, is that yes white noise is random, but the low >> frequency components are, well, low frequency. > > You can't here 1Hz though, evenif you can hear its contray 1s repeat > frequency.
True. But I meant that it seemed that repeating the repetition of a low-frequency artifact is easier to hear that artifacts that change quickly. I’m just relaying an observation, not saying I understand it. That is, in listening to white noise, if you pay attention to different frequency area, you have a hiss on top, and in the low part you can hear a constantly changing and morphing series of chugs and things that I don’t know how to describe. It’s pretty easy to latch onto one of those repeating when it gets down in the 2-second range. That’s the best I can seem to describe it :-/ > Now take a long enough random sequence with all of its content under 200Hz or > so filtered out by DFT. Repeat the DFT block. Can you still hear the > repetition? By definition, there's no "bump" there, either. At least if you > did it right. > >> Anyway, like I said, I’ve been through this before so there were no >> surprises. Sampo, were you looking for a particular revelation? I’m not sure >> if I’m listening for what you were getting at. > > You prolly are. You seem to know what I'm getting at in full. But if you > think about what that means, really, it just is *really* difficult to see > what *these* LTI implictions have to do with the *shorter* time LTI > implications we normally work with and e.g. base our codecs on. > > And really, I just *love* the people of old who know about this or old, > and/or try it out anew. :) Haha—yeah, that’s me, old guy ;-) > -- > Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front > +358-40-3255353, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2-- -- 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
