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:
“When the sheep are in the fauld, and the kye at hame,
And a’ the warld to rest are gane,
The waes o’ my heart fa’ in showers frae my e’e,
While my gudeman lies sound by me.
Young Jamie lo’ed me weel, and sought me for his bride;”
—Lady Anne Lindsay (1750–1825)
“Surely the only sound foundation for a civilization is a sound state of mind.”
—E.M. (Edward Morgan)
“It is a tale
Told by an idiot, full of sound and fury;
Signifying nothing.”
—William Shakespeare (1564–1616)