Sound Waves, Radio Waves, Light, and X-rays

Sound waves consist of a series of air pressure variations that move through air or other materials like water. They are created by the vibration of an object like your vocal chords vibrate to produce your voice.  

Sound waves can be detected when they cause a detector to vibrate. A microphone can detect pressure variations and convert them into an electrical signal. We can all hear because our eardrum vibrates from sound waves allowing us to sense them.