Sound waves can be differentiated on the basis of their loudness, pitch, and timbre. Loudness is associated with the amplitude of the sound wave and refers to the amount of maximum displacement of vibrating particles of the medium from their mean position. Higher amplitude implies louder sound. On the other hand, the frequency of the vibrations traveling through the medium defines the pitch of a sound wave. The greater the frequency of vibrations, the higher the pitch. Timbre refers to the quality of the sound wave that helps to differentiate between two sources producing sound of the same amplitude and frequency. For example, a musical note produced by a guitar and a flute having the same amplitude and frequency sounds different due to the distinct harmonic content. This difference in the sound is referred to as tone color, quality, or timbre.