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hydrophone
(Encyclopedia) hydrophonehydrophonehīˈdrəfōnˌ [key], device that receives underwater sound waves and converts them to electrical energy; the voltage generated can then be read on a meter or played…Mach number
(Encyclopedia) Mach numberMach numbermäk [key] [for E. Mach], ratio between the speed of an object and the speed of sound in the medium in which the object is traveling. An airplane that has the…Owen Sound
(Encyclopedia) Owen Sound, city (1991 pop. 21,674), SE Ont., Canada, on Owen Sound. It is a port and railroad terminal in a farming region, and it has large grain elevators. There are printing and…I
(Encyclopedia) I, 9th letter of the alphabet. This vowel can be pronounced with a short vowel sound, as the ĭ in sit, or with a long vowel sound, like the ī in ride. The Greek correspondent is iota.…ultrasonics
(Encyclopedia) ultrasonics, study and application of the energy of sound waves vibrating at frequencies greater than 20,000 cycles per second, i.e., beyond the range of human hearing. The application…Stamford, city, United States
(Encyclopedia) Stamford, city (1990 pop. 108,056), Fairfield co., SW Conn., on Long Island Sound; settled 1641, inc. 1893 as a city within the town of Stamford (the two were consolidated in 1949). A…Viscount Melville Sound
(Encyclopedia) Viscount Melville Sound, 250 mi (402 km) long and 100 mi (161 km) wide, arm of the Arctic Ocean, Northwest Territories and Nunavut, Canada, between Victoria and Prince of Wales islands…Rayleigh, John William Strutt, 3d Baron
(Encyclopedia) Rayleigh, John William Strutt, 3d BaronRayleigh, John William Strutt, 3d Baronrāˈlē [key], 1842–1919, English physicist. He was professor at Cambridge (1879–84) and at the Royal…Lucier, Alvin Augustus, Jr.
(Encyclopedia) Lucier, Alvin Augustus, Jr., 1931-2021, American experimental composer, b. Nashua, N.H., Yale Univ. (B.A., 1954), Brandeis Univ. (M.A…Gance, Abel
(Encyclopedia) Gance, Abel, 1889–1981, pioneering French filmmaker. He acted on the stage in the early 1900s and appeared on the silent screen. From 1911 he wrote and directed several films; his…Trending
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