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 Young Man’s Best Companion, The Farrier’s Sure Guide, The Veterinary Surgeon, Paradise Lost, The Pilgrim’s Progress, Robinson Crusoe, Ash’s Dictionary, and Walkingame’s Arithmetic, constituted his library; and though a limited series, it was one from which he had acquired more sound information by diligent perusal than many a man of opportunities had done from a furlong of laden shelves.”
—Thomas Hardy (1840–1928)
“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)
““Our earth is degenerate in these latter days. Bribery and corruption are common. Children no longer obey their parents. . . . The end of the world is evidently approaching.” Sound familiar? It is, in fact, the lament of a scribe in one of the earliest inscriptions to be unearthed in Mesopotamia, where Western civilization was born.”
—C. John Sommerville (20th century)