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shock wave

(Encyclopedia)shock wave, wave formed of a zone of extremely high pressure within a fluid, especially the atmosphere, that propagates through the fluid at a speed in excess of the speed of sound. A shock wave is ca...

organum

(Encyclopedia)organum ôrˈgənəm [key], in music, compositional technique, developed in Europe during the 10th cent., in which each note of Gregorian chant melody was doubled by another note. In the earliest exam...

Bell, Alexander Melville

(Encyclopedia)Bell, Alexander Melville, 1819–1905, Scottish-American educator, b. Edinburgh. Bell worked out a physiological or visible alphabet, with symbols that were intended to represent every sound of the hu...

Lynn, Loretta

(Encyclopedia)Lynn, Loretta, 1932–2022, American country singer and songwriter, b. Butcher Hollow, Ky. One of the most successful singers in modern country music, s...

laryngitis

(Encyclopedia)laryngitis, inflammation of the mucous membrane of the voice box, or larynx, usually accompanied by hoarseness, sore throat, and coughing. Acute laryngitis is often a secondary bacterial infection tri...

Baez, Joan

(Encyclopedia)Baez, Joan bīpstr;ĕz, bäˈ– [key], 1941–, American folk singer and political activist, b. New York City. Baez began singing traditional folk ballads, blues, and spirituals in Cambridge, Mass., ...

Thomson, Virgil

(Encyclopedia)Thomson, Virgil, 1896–1989, American composer, critic, and organist, b. Kansas City, Mo. Thomson studied in Paris with Nadia Boulanger. Until about 1926 he wrote in a dissonant, neoclassic style, bu...

contralto

(Encyclopedia)contralto kəntrălˈtō [key], female voice of lowest pitch. Originally, the term denoted a second voice set against (contra) a high voice (alto); thus, a second high voice. Since most second parts w...

Monroe, Bill

(Encyclopedia)Monroe, Bill (William Smith Monroe), 1911–96, country singer, musician, and songwriter, often called the “father of bluegrass,” b. Rosine, Ky. A m...

sound

(Encyclopedia)CE5 Sound waves: An air pressure wave radiating outward from a loudspeaker is perceived as sound. sound, any disturbance that travels through an elastic medium such as air, ground, or water to be ...