Back تقرير فرانز ARZ Franz Melde German Franz Melde Spanish فرانز ملده Persian Franz Melde French פרנץ מלדה HE फ्रान्झ मेल्डे Marathi Franz Melde Portuguese Франц Мельде Ukrainian

Franz Melde

Standing waves, in which each immobile point represents a node.

Franz Emil Melde (March 11, 1832 in Großenlüder near Fulda – March 17, 1901 in Marburg) was a German physicist and professor. A graduate of the University of Marburg under Christian Ludwig Gerling, he later taught there, focusing primarily on acoustics,[1] also making contributions to fields including fluid mechanics and meteorology. He began in 1860 as Gerling's assistant at the University's Mathematical and Physical Institute, succeeding him in 1864.

Standing waves were first discovered by Melde, who coined the term "standing wave" (stehende Welle) around 1860.[2][3][4][5] What is known as "Melde's experiment", "a lecture-room standby",[6] demonstrates standing waves and their patterns on a string, is used to measure the speed of transverse wave, and to determine the effect of tension, length, and mass on the transverse waves of a string. In 1859 Melde generated parametric oscillations in a string by employing a tuning fork to periodically vary the tension at twice the resonance frequency of the monochord string.[7][8]

He was a member of the Landsmannschaft fraternity. In 1885 he was elected to the Academy of Sciences Leopoldina and in 1893 received a silver medal at the Chicago Columbian Exposition.

  1. ^ Physical Review
  2. ^ Melde, Franz. Ueber einige krumme Flächen, welche von Ebenen, parallel einer bestimmten Ebene, durchschnitten, als Durchschnittsfigur einen Kegelschnitt liefern: Inaugural-Dissertation... Koch, 1859.
  3. ^ Melde, Franz. "Ueber die Erregung stehender Wellen eines fadenförmigen Körpers." Annalen der Physik 185, no. 2 (1860): 193-215.
  4. ^ Melde, Franz. Die Lehre von den Schwingungscurven...: mit einem Atlas von 11 Tafeln in Steindruck. JA Barth, 1864.
  5. ^ Melde, Franz. "Akustische Experimentaluntersuchungen." Annalen der Physik 257, no. 3 (1884): 452-470.
  6. ^ Beyer, Robert T. (1999). Sounds of Our Times: Two Hundred Years of Acoustics, p.134. Springer. ISBN 9780387984353.
  7. ^ Melde, F. (1859) "Über Erregung stehender Wellen eines fadenförmigen Körpers" [On the excitation of standing waves on a string], Annalen der Physik und Chemie (Ser. 2), vol. 109, pages 193-215.
  8. ^ Scott, Alwyn (2006). Encyclopedia of Nonlinear Science, p.683. Routledge. ISBN 9781135455583. "When the tuning fork vibrates and the string is tight, the string performs transverse oscillations with a frequency equal to half the frequency of the tuning fork.

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