Sound is a form of physical energy that is caused by vibrations passing through a medium (such as air or water). Music is the art of combining sounds from instruments or the human voice to produce beauty. Resonance is the tendency of an object to vibrate more strongly at certain frequencies.
Intensity is the amount of energy that a sound wave carries. It is measured in units called decibels (dB). The number of vibrations per second of a sound wave is known as the frequency. It is measured in units called hertz (Hz).
