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:
“Midnight has come and the great Christ Church bell
And many a lesser bell sound through the room;
And it is All Souls’ Night.
And two long glasses brimmed with muscatel
Bubble upon the table. A ghost may come;
For it is a ghost’s right....”
—William Butler Yeats (1865–1939)
“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)
“We can say that the sound is the primary object of the act of hearing, and that the act of hearing itself is the secondary object.”
—Franz Clemens Brentano (1838–1917)