Sound, Pitch, Frequency, wavelength, amplitude and loudness
There are a few basic ideas here, nothing too complicated.
The wave equation c = f λ tells us that for a wave of fixed speed (most of them) when the frequency increase the wavelength decreases and vice versa.
You
could have a go at a very easy quiz here
Understanding
what sound is and how it works is pretty straightforward.
Some links are below but this is straightforward stuff – hopefully!
One
Two
As well as using the wave equation, you should also be familiare with common speeds of sound in solids, liquids and gases. Some examples are on the following page: http://hypertextbook.com/physics/waves/sound/