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.[1][2]

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.[3]

More biographical detail exists in the Dansk Biografisk Leksikon[4] and the Nordisk Familjebok,[5] in Danish.

Family

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)[6]
  • 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[7]

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.[8]
  • WorldCat Entries[9]
    • Sagen mod praesten i Vejlby og de sager, der fulgte by Absalon Larsen (Book)[10]
    • Telegrafonen og den Traadløse og Opfinderparret Valdemar Poulsen og P. O. Pedersen by Absalon Larsen (Book)[11]
    • Naturfredning i Frederiksborg amt by Absalon Larsen (Book)[12]
    • 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)[13]
    • Om Radioforstyrrelser og Midler derimod (Book)[14]
    • The Discovery of electromagnetism made in the year 1820 by H. C. Oersted by Absalon Larsen (Book)[15]

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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