Some Facts about sound waves

A sound wave happens when air molecules are shoved together and bump apart again, which in turn bumps into other air molecules and therefore resulting in a chain reaction moving outwards like ripples produced when you skip a rock. It is not safe to stand beside a big bell when it rings as the powerful sound waves can burst blood vessels in your nose an example of such an occurence is when one stands beside the huge bell of Notre Dame Cathedral in Paris.

We can only hear sound when there is air or another substance around to pass on the sound waves. Therefore you cannot hear anything in space as there is no air.

An oscilloscope is used to measure sound waves.The sound waves make a beam of electrons jump about on a screen. It shows as a curve or zigzag and faster vibrations mean higher frequency and a higher pitch of sound while slower vibrations means lower frequwncy and therefore lower pitch of sound.