SOUND - A vibratory disturbance with frequencies in the range (for humans) of between (generally) 20 Hertz (cycles per second) to 20,000 Hertz.

A text summary of the clickable map above, meant for web-crawlers and other automatic tools:
sound has origin sound wave
sound has periodicity beat
sound has special example voices
sound has specific interval unison
sound has specific interval minor second
sound has specific interval major second
sound has specific interval minor third
sound has specific interval major third
sound has specific interval perfect fourth
sound has specific interval augmented fourth
sound has specific interval perfect fifth
sound has specific interval minor sixth
sound has specific interval major sixth
sound has specific interval minor seventh
sound has specific interval major seventh
sound has specific interval diminished fifth
sound has specific interval octave
sound has frequencies from 20 htz to 20,000 htz
sound has length duration
sound has loudness level piano
sound has loudness level forte
sound has loudness level mezzo piano
sound has loudness level mezzo forte
sound is received by human ear
sound is substance of music