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:
“In spite of all her faults her name was so holy to him that it had never once passed his lips since her death, except in low whispers to himself,—low whispers made in the perfect, double-guarded seclusion of his own chamber. “Cora, Cora,” he had murmured, so that the sense of the sound and not the sound itself had come to him from his own lips.”
—Anthony Trollope (1815–1882)
“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)
“Homer and Shakespeare and Milton and Marvell and Wordsworth are but the rustling of leaves and crackling of twigs in the forest, and there is not yet the sound of any bird. The Muse has never lifted up her voice to sing.”
—Henry David Thoreau (1817–1862)