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:
“As far as I’m concerned, “whom” is a word that was invented to make everyone sound like a butler.”
—Calvin Trillin (b. 1935)
“Sound, sound the clarion, fill the fife!
Throughout the sensual world proclaim,
One crowded hour of glorious life
Is worth an age without a name.”
—Thomas Osbert Mordaunt (1730–1809)
“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)