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 freedom to make a fortune on the Stock Exchange has been made to sound more alluring than freedom of speech.”
—John Mortimer (b. 1923)
“It is easy to face Death and Fate, and the things that sound so dreadful. It is on my muddles that I look back with horror—on the things that I might have avoided.”
—E.M. (Edward Morgan)
“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)