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Relationship of the atmosphere and ionosphere. The ionosphere (/ aɪ ˈ ɒ n ə ˌ s f ɪər /) [1] [2] is the ionized part of the upper atmosphere of Earth, from about 48 km (30 mi) to 965 km (600 mi) above sea level, [3] a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar ...
Contents: Ancient music – Early history – 1500s – 1510s – 1520s – 1530s – 1540s – 1550s – 1560s – 1570s – 1580s – 1590s – 1600s – 1610s ...
Common practice period – period of about 250 years during which the tonal system was regarded as the only basis for composition. It began when composers' use of the tonal system had clearly superseded earlier systems, and ended when some composers began using significantly modified versions of the tonal system, and began developing other systems as well.
Musica universalis—which had existed as a metaphysical concept since the time of the Greeks—was often taught in quadrivium, [8] and this intriguing connection between music and astronomy stimulated the imagination of Johannes Kepler as he devoted much of his time after publishing the Mysterium Cosmographicum (Mystery of the Cosmos), looking over tables and trying to fit the data to what he ...
"But that music is a language by whose means messages are elaborated, that such messages can be understood by the many but sent out only by the few, and that it alone among all language unites the contradictory character of being at once intelligible and untranslatable—these facts make the creator of music a being like the gods and make music itself the supreme mystery of human knowledge."
This section shows the Japan-specific timeline of music technology. Note: Some items in the list are not the first even in Japan. 1934 : NEC engineer Akira Nakishima's switching circuit theory lays foundations for digital circuit design [9] 1935 : Yamaha releases Magna Organ, an early electrostatic reed organ [10] [11]
Ring-and-spring microphones, such as this Western Electric microphone, were common during the electrical age of sound recording c. 1925–45.. The second wave of sound recording history was ushered in by the introduction of Western Electric's integrated system of electrical microphones, electronic signal amplifiers and electromechanical recorders, which was adopted by major US record labels in ...
The entertainment industry (informally known as show business or show biz) is part of the tertiary sector of the economy and includes many sub-industries devoted to entertainment. However, the term is often used in the mass media to describe the mass media companies that control the distribution and manufacture of mass media entertainment.