----- Original Message ----- From: "David Jones" <gnome@hawaii.rr.com> To: <fractint@mailman.xmission.com> Sent: Saturday, November 09, 2002 3:10 AM Subject: [Fractint] Re: FOTD 05-11-02 (Creepy-Crawlies [5])
On 9 Nov 02, at 23:45, Morgan L. Owens wrote:
David Jones wrote:
On 7 Nov 02, at 23:37, Morgan L. Owens wrote:
David Jones wrote:
I wonder if there is such a thing as a musical note too short to be heard by the human ear?
What is the frequency of a handclap?
I wasn't thinking in terms of frequency, more of duration.
So was I; a handclap is too brief for a meaningful frequency to be assigned to it.
But if you recorded it, played it back at a slower speed, I bet you could come up with a frequency spectrum. I suspect handclap has a more complex frequency structure than you would think, since you can hear differences between different people's claps, and there are tonal differences between handclaps ...
David who is no audio engineer!
You're correct. This sort of impulse sound is usually a double exponential pressure wave..a fast rise and a slow decay, which can be Fourier-transformed into spectra. A discrete tone has to be at least one cycle in duration to be heard, so the shortest sound will depend upon its frequency, and will require several cycles for recognition, depending upon the individual ear. In my part of the world it's become customary among the local school-pests to drive a car containing a half-megawatt stereo system, which seem to be playing a series of impulses with a fundemental frequency of 30 Hz! Incredible. The next generation is going to be the "Deaf Generation". John W.