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:
“A general loathing of a gang or sect usually has some sound basis in instinct.”
—Ezra Pound (1885–1972)
“Only the sound remains,
the distant thump of the good elephants,
the voice of the ancient lions
and how the bells
trembled for the flying man.”
—Anne Sexton (1928–1974)
“No man ever stood lower in my estimation for having a patch in his clothes; yet I am sure that there is greater anxiety, commonly, to have fashionable, or at least clean and unpatched clothes, than to have a sound conscience.”
—Henry David Thoreau (1817–1862)