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 general loathing of a gang or sect usually has some sound basis in instinct.”
—Ezra Pound (1885–1972)
“He who wants to persuade should put his trust not in the right argument, but in the right word. The power of sound has always been greater than the power of sense.”
—Joseph Conrad (1857–1924)
“Let not the sound of shallow foppery enter
My sober house.”
—William Shakespeare (1564–1616)