Amplitude (Volume)– Maximum distance particles move from their normal position. Louder the sound, more energy it carries & the bigger the amplitude.
Wavelength– Length of one wave. Distance between one high pressure region (compression) and the next.
Frequency– Number of waves produced in on second. Measured in hertz, Hz. Higher pitched sound has a higher frequency than a lower pitched sound.
Compression– Where particles are squashed together.
Rarefaction– Where particles are spread out.
Tension and release– This is where composers in music build up tension in their sound and then release it.