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:
“But those rare souls whose spirit gets magically into the hearts of men, leave behind them something more real and warmly personal than bodily presence, an ineffable and eternal thing. It is everlasting life touching us as something more than a vague, recondite concept. The sound of a great name dies like an echo; the splendor of fame fades into nothing; but the grace of a fine spirit pervades the places through which it has passed, like the haunting loveliness of mignonette.”
—James Thurber (1894–1961)
“Chippenhook was the home of Judge Theophilus Harrington, known for his trenchant reply to an irate slave-owner in a runaway slave case. Judge Harrington declared that the owner’s claim to the slave was defective. The owner indignantly demanded to know what was lacking in his legally sound claim. The Judge exploded, ‘A bill of sale, sir, from God Almighty!’”
—For the State of Vermont, U.S. public relief program (1935-1943)
“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)