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:
“Alex: I don’t mean to sound like a snob.
Cory: You couldn’t sound like anything else.”
—Blake Edwards (b. 1922)
“There is no legislation—I care not what it is—tariff, railroads, corporations, or of a general political character, that all equals in importance the putting of our banking and currency system on the sound basis proposed in the National Monetary Commission plan.”
—William Howard Taft (1857–1930)
“It was the unfailing and characteristic sound of those lakes.”
—Henry David Thoreau (1817–1862)