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Søren Absalon Larsen

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Danish physicist
Søren Absalon Larsen
Søren Absalon Larsen
Born(1871-04-05)5 April 1871
Nørre Aaby, Denmark
Died2 January 1957(1957-01-02) (aged 85)
Gentofte, Denmark
NationalityDanish
Known forLarsen effect
Scientific career
FieldsPhysics, Acoustics
InstitutionsTechnical University of Denmark

Søren Absalon Larsen (April 5, 1871 – January 2, 1957) was a Danish physicist who worked in the field of electroacoustics and is best known for giving his name to the Larsen effect.

Absalon Larsen was originally MSc. Philosophy and taught theology, then he began to study physics. He subsequently joined to assist Professor Peter Kristian Prytz in the organization of a new exercise course in electronics for mechanical engineers. He was employed at the Polytechnic college, first as a lecturer, later as a professor of electrical engineering. From 1937 he was chairman of the electrical engineering group under the Danish Academy of Technical Sciences.

More biographical detail exists in the Dansk Biografisk Leksikon and the Nordisk Familjebok, in Danish.

Family

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Larsen was the son of farmer and carpenter, later maltster Hans Christian Larsen (1834-1920) and Ingeborg Absalonsen (1833–92).

In 1900, he married Agnes Hedevig Elisabeth Munch (born 11 June 1874 in Haslemere - died 20 September 1953 in Gentofte).

Education

  • 1896 - 1897: Assistant Professor K. Prytz (Peter Kristian Prytz, 1851-1929)
  • 1898: Copenhagen University gold medal for thesis on Electrical Conductivities of Amalgamates
  • 1898 - 1903: Assistant at Polytechnic College Physical Laboratory
  • 1903 - 1906: Associate Professor of electrical engineering at the Polytechnic College
  • 1906 - 1941: Professor of Electrical Engineering at the Technical University
  • 1951: Honorary Doctorate, Technical University of Denmark

Publications

  • AC 1 + 2" 1923 (book)
  • Messungen von vagabondierenden Stromen in Gas-und Wasserrohren" 1901 (journal article) ~ Measurement of Stray Electrical Current Effects in Gas and Water Pipes.
  • A. Larsen, “Ein akustischer Wechselstromerzeuger mit regulierbarer Periodenzahl für schwache Ströme,” Elektrotech. Z., ETZ 32, pp. 284–285, Mar. 1911.
  • WorldCat Entries
    • Sagen mod praesten i Vejlby og de sager, der fulgte by Absalon Larsen (Book)
    • Telegrafonen og den Traadløse og Opfinderparret Valdemar Poulsen og P. O. Pedersen by Absalon Larsen (Book)
    • Naturfredning i Frederiksborg amt by Absalon Larsen (Book)
    • Methodical classification of international definitions : A paper read before the special committee on nomenclature, a their meeting in Cologne, March 1913 by Absalon Larsen (Book)
    • Om Radioforstyrrelser og Midler derimod (Book)
    • The Discovery of electromagnetism made in the year 1820 by H. C. Oersted by Absalon Larsen (Book)

References

  1. "Absalon Larsen". Dansk Biografisk Leksikon (in Danish) (3rd ed.). Copenhagen. 1979–84. Retrieved 14 December 2011.{{cite encyclopedia}}: CS1 maint: location missing publisher (link)
  2. Weaver, R. L.; Lobkis, O. I. (2006). "On the linewidth of the ultrasonic Larsen effect in a reverberant body". The Journal of the Acoustical Society of America. 120 (1): 102–109. Bibcode:2006ASAJ..120..102W. doi:10.1121/1.2205128.
  3. Online Biography, Danish, Source: Danish Biographical Encyclopedia 1933 + 1979-84.
  4. Dansk Biografisk Leksikon
  5. Nordisk Familjebok
  6. Niels Bohr Collected Works, Page 328, footnote
  7. Technical University of Denmark, Honorary Doctorates
  8. Analysis, Design, and Evaluation of Acoustic Feedback Cancellation Systems for Hearing Aids – A Novel Approach to Unbiased Feedback Estimation, Ph.D. Thesis Meng Guo
  9. WorldCat Entries
  10. Sagen mod praesten i Vejlby og de sager, der fulgte
  11. Telegrafonen og den Traadløse og Opfinderparret Valdemar Poulsen og P. O. Pedersen
  12. Naturfredning i Frederiksborg amt
  13. Methodical classification of international definitions : A paper read before the special committee on nomenclature, a their meeting in Cologne, March 1913
  14. Om Radioforstyrrelser og Midler derimod
  15. The Discovery of electromagnetism made in the year 1820 by H. C. Oersted
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