Pitch is the sound a frequency produces. See the graphic below to help you understand what all that meant. For the record, all the examples below are based on a sine wave. This is the purest sound that can be produced and thus us the easiest to illustrate. To understand pitch better, the next illustration shows two waveforms.
Octaves are all a subset of the same frequency.
Another word for cycle is hertz. Instead it refers to the amount of sound DATA that is transferred per second. Now, let's expand on the the previous article. You remeber that expanded sound creates more volume as the voices blend correctly, and this is a and effect of two waves out of phase colliding. Well, not only does the sound increase, but this creates distortion in the sound.