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:
“He hath a heart as sound as a bell and his tongue is the clapper, for what his heart thinks, his tongue speaks.”
—William Shakespeare (1564–1616)
“It is not the sound made by victors, or the sound made by losers; it is the sound of revelers that I hear.”
—Bible: Hebrew, Exodus 32:18.
“Letters are like wine; if they are sound they ripen with keeping. A man should lay down letters as he does a cellar of wine.”
—Samuel Butler (1835–1902)