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:
“A sound mind in a sound body, is a short, but full description of a happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little the better for anything else.”
—John Locke (1632–1704)
“As far as I’m concerned, “whom” is a word that was invented to make everyone sound like a butler.”
—Calvin Trillin (b. 1935)
“Monte Beragon: When I’m close to you like this, there’s a sound in the air like the beating of wings. Do you know what that is?
Mildred Pierce: No, what?
Monte Beragon: My heart, beating like a schoolboy’s.
Mildred Pierce: Is it? I thought it was mine.”
—Ranald MacDougall (1915–1973)