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Ernst Florens Friedrich Chladni (; 30 November 1756 – 3 April 1827) was a German physicist and musician. His most important work, for which he is sometimes labeled the ''father of acoustics'', included research on vibrating plates and the calculation of the speed of sound for different gases.〔(【引用サイトリンク】publisher=University of Cambridge )〕 He also undertook pioneering work in the study of meteorites and so is also regarded by some as the ''father of meteoritics''. == Personal life == Although Chladni was born in Wittenberg in Saxony, his family originated from Kremnica, then part of the Kingdom of Hungary and today a mining town in central Slovakia. Chladni has therefore been identified as German,〔("Ernst Florens Friedrich Chladni, or Ernst F. F. Chladni (German physicist)" ), ''Encyclopædia Britannica'': Related Articles〕〔(Ernst Florens Friedrich Chladni, German physicist, 1802 Image Preview ), (Science and Society Picture Library )〕 Hungarian and Slovak.〔 Chladni came from an educated family of academics and learned men. Chladni's great-grandfather, the Lutheran clergyman Georg Chladni (1637–92), had left Kremnica in 1673 during the Counter Reformation. Chladni's grandfather, Martin Chladni (1669–1725), was also a Lutheran theologian and, in 1710, became professor of theology at the University of Wittenberg. He was dean of the theology faculty in 1720–1721 and later became the university's rector. Chaldni's uncle, Justus Georg Chladni (1701–1765), was a law professor at the university. Another uncle, Johann Martin Chladni (1710–1759), was a theologian, a historian and a professor at the University of Erlangen and the University of Leipzig. Chladni's father, Ernst Martin Chladni (1715–1782), was a law professor and rector of the University of Wittenberg. He had joined the law faculty there in 1746. Chladni's mother was Johanna Sophia and he was an only child. His father disapproved of his son's interest in science and insisted that Chladni become a lawyer.〔〔〔 Chladni studied law and philosophy in Wittenberg and Leipzig, obtaining a law degree from the University of Leipzig in 1782. That same year, his father died and he turned to physics in earnest.〔P. 101 Oxford Dictionary of Scientists – Oxford University Press – 1999〕 Chladni died in 1827 in Breslau, Lower Silesia, then part of the Kingdom of Prussia and today the city of Wrocław in southwestern Poland. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ernst Chladni」の詳細全文を読む スポンサード リンク
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