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Though ancient Chinese, Indians, Egyptians and Mesopotamians are known to have studied the mathematical principles of sound, [2] the Pythagoreans (in particular Philolaus and Archytas) [3] of ancient Greece were the first researchers known to have investigated the expression of musical scales in terms of numerical ratios, [4] particularly the ratios of small integers.
A distinct use of the term sound from its use in physics is that in physiology and psychology, where the term refers to the subject of perception by the brain. The field of psychoacoustics is dedicated to such studies. Webster's dictionary defined sound as: "1. The sensation of hearing, that which is heard; specif.: a. Psychophysics.
Sound intensity, also known as acoustic intensity, is defined as the power carried by sound waves per unit area in a direction perpendicular to that area, also called the sound power density and the sound energy flux density. [2] The SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m 2).
A "bowafridgeaphone" made by Iner Souster constructed from objects including refrigerator grates, a bundt cake pan and a metal salad bowl [1] Found objects are sometimes used in music, often to add unusual percussive elements to a work. Their use in such contexts is as old as music itself, as the original invention of musical instruments almost ...
The invention of sound recording and the ability to edit music gave rise to new subgenres of classical music, including the acousmatic [64] and Musique concrète schools of electronic composition. Sound recording was a major influence on the development of popular music genres, because it enabled recordings of songs and bands to be widely ...
(1:12) College Football Playoff preview (19:05) Alabama needs cash now! (35:54) Diego Pavia granted one more year (50:20) CFP game picks. Follow Dan @DanWetzel. Follow Pat @ByPatForde.
The College Football Playoff first round begins on Friday, Dec. 20 and will air on ABC and ESPN at 8 p.m. ET. Fans can also stream the action with a Fubo subscription, which offers a free trial.
Swedish soldiers operating an acoustic locator in 1940. Acoustic location is a method of determining the position of an object or sound source by using sound waves. Location can take place in gases (such as the atmosphere), liquids (such as water), and in solids (such as in the earth).