Barkhausen, Heinrich Georg
- Barkhausen, Heinrich Georg
-
▪ German physicist
born Dec. 2, 1881, Bremen, Ger.
died Feb. 20, 1956, Dresden, E.Ger. [Germany]
German physicist who discovered the
Barkhausen effect, a principle concerning changes in the magnetic properties of metal.
Barkhausen attended the universities of Munich and Berlin before earning his doctorate in 1907 from Göttingen. After working for the Siemens & Halske laboratories in Berlin, he accepted the world's first professorship in the communications branch of electrical engineering, at the Technical Academy in Dresden (1911). There he worked on theories of spontaneous oscillation and nonlinear switching elements and formulated electron-tube coefficients that are still in use. He also experimented with
acoustics, proposing methods for the subjective measurement of loudness.
His work in acoustics and
magnetism led to the discovery in 1919 of the Barkhausen effect, which provided evidence that magnetization affects whole domains of a ferromagnetic material, rather than individual atoms alone.
In 1920 Barkhausen developed, with Karl Kurz, the Barkhausen-Kurz oscillator for ultrahigh frequencies (a forerunner of the microwave tube), which led to the understanding of the principle of velocity modulation. He is also known for experiments on shortwave radio transmissions.
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Universalium.
2010.
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Barkhausen , Heinrich Georg — (1881–1956) German physicist After attending the gymnasium and engineering college in his native city of Bremen, Barkhausen gained his PhD in Göttingen and in 1911 became professor of electrical engineering in Dresden. Here he formulated the… … Scientists
Heinrich Georg Barkhausen — Briefmarkenausgabe zum 100. Geburtstag Barkhausens (Deutsche Post der DDR 1981) Heinrich Georg Barkhausen (* 2. Dezember 1881 in Bremen; † 20. Februar 1956 in Dresden) war ein deutscher Physiker … Deutsch Wikipedia
Heinrich Barkhausen — Timbre postal est allemand à l effigie de Heinrich Barkhausen. Heinrich Georg Barkhausen (Brême, Allemagne, 2 Décembre 1881 – Dresde, Allemagne, 20 Février 1956) est un physicien, électrotechnicien, et psycho acousticien allemand. Biographie… … Wikipédia en Français
Heinrich Barkhausen — Infobox Scientist name = PAGENAME box width = image size =150px caption = PAGENAME birth date = December 2,1881 birth place = Bremen death date = February 20, 1956 death place = residence = |citizenship = nationality = German ethnicity = field =… … Wikipedia
Barkhausen effect — /bahrk how zeuhn, bahr kow /, Physics. the phenomenon of short, sudden changes in the magnetism of a ferromagnetic substance occurring when the intensity of the magnetizing field is continuously altered. [1955 60; named after H. Barkhausen (1881… … Universalium
Heinrich Barkhausen — Heinrich Georg Barkhausen (* 2. Dezember 1881 in Bremen; † 20. Februar 1956 in Dresden) war ein deutscher Physiker. Nach ihm sind in der Physik und Technik unter anderem der magnetische Barkhausen Effekt, die Barkhausenschaltung, die Barkhausen… … Deutsch Wikipedia
Heinrich Barkhausen — Heinrich Georg Barkhausen Sello alemán de 1981 en el que aparece Heinrich Barkhausen. Nacimiento 2 de diciembre de 1881 Bremen … Wikipedia Español
Georg Barkhausen — (* 28. Juni 1849 in Bückeburg; † 1. April 1923 in Hannover; vollständiger Name: Karl Georg Barkhausen) war ein deutscher Bauingenieur und Hochschullehrer. Als Professor war er von 1904 bis 1907 auch Rektor der Technischen Hochschule Hannover.… … Deutsch Wikipedia
Barkhausen stability criterion — The Barkhausen stability criterion was put forth by German physicist Heinrich Georg Barkhausen (1881 1956) for sustained oscillations and it states that: #The loop gain of the oscillator circuit must be greater than or equal to unity, that is,… … Wikipedia
Barkhausen — Bạrkhausen, Heinrich Georg, Physiker, * Bremen 2. 12. 1881, ✝ Dresden 20. 2. 1956; ab 1911 Professor an der TH Dresden; gründete dort das erste Institut für Schwachstromtechnik; grundlegende Arbeiten über Elektronenröhren und elektrischen… … Universal-Lexikon
