In the following diagram the waves move from left to right and then stop. The motion of the waves lasts for two seconds. Figure caption, A 2 second wave with 2 peaks and troughs. Answer these ...

It is important to note that the amplitude is not the distance between the top and bottom of a wave. The wavelength of a wave is the distance between a point on one wave and the same point on the next ...

So far we have only considered the amplitude of single sources of sound. However, in most practical situations more than one source of sound is present; these may result from other musical instruments ...