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:
“All sound heard at the greatest possible distance produces one and the same effect, a vibration of the universal lyre, just as the intervening atmosphere makes a distant ridge of earth interesting to our eyes by the azure tint it imparts to it.”
—Henry David Thoreau (1817–1862)
“An old pond—
a frog tumbles in—
the sound of water.”
—Matsuo Basho (1644–1694)
“my gentle-hearted Charles, to whom
No sound is dissonant which tells of Life.”
—Samuel Taylor Coleridge (1772–1834)