Originally Posted by: polanskyBeing a bit technical the whole enchilada is this:

FREQUENCY

A PITCHED SOUND is one that has a repetitive CYCLE or PERIOD. PITCH is determined by the number of CYCLES per second and is called FREQUENCY. The term, HERTZ (Hz) refers to the mathematician, Henrich Hertz and is used to represent the number of cycles per second. The RANGE OF AUDIBLE FREQUENCY FOR THE HUMAN EAR is between approximately 16 Hz and 20,000 Hz (20 kHz). The note 'A' above Middle C (C3) has 440 cycles per second (Hz).

Check this site has some intresting facts and graphics that make it really easy to understand

http://ftp.ec.vanderbilt.edu/computermusic/musc216site/what.is.sound.html

Class, you are dismissed.. :D

The site created a flashback to my studies in the Architectural Acoustic Articulation Index, especially with resourcing to Longitudinal Wavelength. Using White and Pink Noise synthesizers for many of the sound related projects I encounter, the site refreshed my memory on a few things.
Thanks for the enchiladas.