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:
“As far as I’m concerned, “whom” is a word that was invented to make everyone sound like a butler.”
—Calvin Trillin (b. 1935)
“It is easy to face Death and Fate, and the things that sound so dreadful. It is on my muddles that I look back with horror—on the things that I might have avoided.”
—E.M. (Edward Morgan)
“Envy awakens at the sound of a distant laugh.”
—Mason Cooley (b. 1927)