On Wed, 28 Jan 2009, Herbert Ward wrote: > >> The >> width of the central peak ... increases as >> the interval decreases, but I could not come up with any simple mechanism >> that would shift the maximum of the curve noticeably. > > I verified this experimentally. > > In other words, determining frequencies with shorter time intervals in Fourier > analysis is like reading a speedometer whose needle get wider -- you're > OK if you use the middle of the needle as the "hotspot".
I'd say it's more like standing still for half an hour, then going 100 miles per hour for the next 30 minutes, and arguing in court that you do not deserve a ticket because your average speed was 50 miles per hour. Stated differently, I am not sure that our brains can associate a unique pitch with a sound that has lasted for only 0.1 sec any more than you can by looking at the power spectrum obtained by Fourier analysis. Peter. the next auto-quote is: We lock up our poor, our uneducated, our unruly, our unstable and our addicted, where other countries provide treatment, mental hospitals and care. (Jesse Jackson Sr.) /\/\ Peter Nightingale Telephone (401) 874-5882 Department of Physics, East Hall Fax (401) 874-2380 University of Rhode Island Kingston, RI 02881 To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
