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:
“He seems determined to make a trumpet sound like a tin whistle.”
—Aneurin Bevan (1897–1960)
“There have been many stories told about the bottom, or rather no bottom, of this pond, which certainly had no foundation for themselves. It is remarkable how long men will believe in the bottomlessness of a pond without taking the trouble to sound it.”
—Henry David Thoreau (1817–1862)
“The old coat that I wear is Concord; it is my morning robe and study gown, my working dress and suit of ceremony, and my nightgown after all. Cleave to the simplest ever. Home,—home,—home. Cars sound like cares to me.”
—Henry David Thoreau (1817–1862)