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:
“[T]here is only one sound argument for democracy, and that is the argument that it is a crime for any man to hold himself out as better than other men, and, above all, a most heinous offense for him to prove it.”
—H.L. (Henry Lewis)
“Blame but thyself that hast misdone,
And well deserved to have blame;
Change thou thy way so evil begun,
And then my lute shall sound that same:
But if till then my fingers play
By thy desert their wonted way,
Blame not my lute.”
—Sir Thomas Wyatt (1503?–1542)
“Let not the sound of shallow foppery enter
My sober house.”
—William Shakespeare (1564–1616)