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:
“There was never a sound beside the wood but one,
And that was my long scythe whispering to the ground.”
—Robert Frost (1874–1963)
“The sound of tireless voices is the price we pay for the right to hear the music of our own opinions. But there is also, it seems to me, a moment at which democracy must prove its capacity to act. Every man has a right to be heard; but no man has the right to strangle democracy with a single set of vocal chords.”
—Adlai Stevenson (1900–1965)
“The hills are alive with the sound of music.”
—Oscar Hammerstein II (1895–1960)