Editing Sine wave (section)

== Audio example ==
{{Listen
| filename     = 220 Hz sine wave.ogg
| title        = Sine wave
| description  = Five seconds of a 220 Hz sine wave. This is the [[Sound#Waves|sound wave]] described by a sine function with ''f'' = 220 oscillations per second.
}}

A sine wave represents a single [[frequency]] with no [[harmonic]]s and is considered an [[Acoustics|acoustically]] [[pure tone]]. Adding sine waves of different frequencies results in a different waveform. Presence of higher harmonics in addition to the [[Fundamental frequency|fundamental]] causes variation in the [[timbre]], which is the reason why the same [[Pitch (music)|musical pitch]] played on different instruments sounds different.