Sound
Similarly, a source of sound can have many different frequencies mixed. A musical tone's timbre is characterized by its harmonic spectrum. Sound in our environment that we refer to as noise includes many different frequencies. When a sound signal contains es, distributed equally over the audio spectrum, it is called white noise.
Read more about this topic: Frequency Spectrum
Famous quotes containing the word sound:
“All sound heard at the greatest possible distance produces one and the same effect, a vibration of the universal lyre, just as the intervening atmosphere makes a distant ridge of earth interesting to our eyes by the azure tint it imparts to it.”
—Henry David Thoreau (1817–1862)
“The last sound on the worthless earth will be two human beings trying to launch a homemade spaceship and already quarreling about where they are going next.”
—William Faulkner (1897–1962)
“Like many of the Upper Class He liked the Sound of Broken Glass.”
—Hilaire Belloc (1870–1953)