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:
“The hills are alive with the sound of music.”
—Oscar Hammerstein II (1895–1960)
“Like many of the Upper Class He liked the Sound of Broken Glass.”
—Hilaire Belloc (1870–1953)
“A person is far more likely to appear to have sound character because he persistently follows his temperament than because he persistently follows his principles.”
—Friedrich Nietzsche (1844–1900)