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:
“Al: Ain’t you gonna look back, Ma? Give the old place a last look?
Ma Joad: We’re goin’ to California, ain’t we? Alright then, let’s go to California.
Al: That don’t sound like you, Ma. You never was like that before.
Ma Joad: I never had my house pushed over before. Never had my family stuck out on the road. I never had to lose everything I had in life.”
—Nunnally Johnson (1897–1977)
“There is a silence where hath been no sound,
There is a silence where no sound may be,
In the cold grave—under the deep, deep sea,
Or in wide desert where no life is found,”
—Thomas Hood (1799–1845)
“The hills are alive with the sound of music.”
—Oscar Hammerstein II (1895–1960)