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 soldier firm and sound of heart.”
—William Shakespeare (1564–1616)
“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)
“For sounds in winter nights, and often in winter days, I heard the forlorn but melodious note of a hooting owl indefinitely far; such a sound as the frozen earth would yield if struck with a suitable plectrum, the very lingua vernacula of Walden Wood, and quite familiar to me at last, though I never saw the bird while it was making it.”
—Henry David Thoreau (1817–1862)