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:
“the children call, and I
Thy shepherd pipe, and sweet is every sound,
Sweeter thy voice, but every sound is sweet;
Myriads of rivulets hurrying through the lawn,
The moan of doves in immemorial elms,
And murmuring of innumerable bees.’”
—Alfred Tennyson (1809–1892)
“Is there no hope for me? Is there no way
That I may sight and check that speeding bark
Which out of sight and sound is passing, passing?”
—Paul Laurence Dunbar (1872–1906)
“But sound of water over a rock
Where the hermit-thrush sings in the pine trees
Drip drop drip drop drop drop drop
But there is no water”
—T.S. (Thomas Stearns)