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:
“There was a sound of revelry by night,
And Belgium’s capital had gathered then
Her beauty and her chivalry, and bright
The lamps shone o’er fair women and brave men;
A thousand hearts beat happily; and when
Music arose with its voluptuous swell,
Soft eyes looked love to eyes which spake again,
And all went merry as a marriage-bell;
But hush! hark! a deep sound strikes like a rising knell!”
—George Gordon Noel Byron (1788–1824)
“It is far easier for the proverbial camel to pass through the needle’s eye, hump and all, than for an erstwhile colonial administration to give sound and honest counsel of a political nature to its liberated territory.”
—Kwame Nkrumah (1900–1972)
“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)