Louis Winslow Austin
Encyclopedia
Louis Winslow Austin was an American
physicist
known for his research on long-range radio
transmissions.
Austin was born in Orwell, Vermont
, and educated at Middlebury College
(class of 1889) and the University of Strasbourg
(then in Germany
), from which he received a Ph.D.
in 1893. From 1893-1901, he taught physics
as an instructor and assistant professor at the University of Wisconsin–Madison
, then returned to Germany for two years at the Physikalisch-Technische Reichsanstalt
in Berlin
where he performed research on hot gases.
In 1904 Austin joined the National Bureau of Standards
to study radio propagation. After the United States Navy
established its Naval Radio Telegraphic Laboratory (later the Naval Research Laboratory) within the bureau, Austin served as its director from 1908-1923, and from 1923-1932 as chief of the Radio Physics Laboratory.
Austin's research focused on radio propagation
and static
, and more specifically the influence of temperature
, humidity
, magnetic storm
s, and sunspot
s on long-range radio transmissions. Under his direction, the Navy conducted long-distance wireless measurements in 1909 and 1910 between the USS Birmingham
and USS Salem
, as they steamed to Liberia
and back, and Fessenden
's station at Brant Rock, Massachusetts. Austin measured received impulses from the ships on the 3,750 and 1,000 meter wavelengths to determine the relationships between radio frequency, distance, and received signal strength. These measurements led Austin and collaborator Dr. Louis Cohen to develop the empirical Austin-Cohen formula for predicting radio signal strength at long distances.
Austin joined the Institute for Radio Engineers (now IEEE) in 1913, in 1914 served as its third president, and in 1927 received its Medal of Honor
"for his pioneer work in the quantitative measurement and correlation of factors involved in radio wave transmission." He also served as a U.S. representative at numerous international radio conferences. Austin died on June 27, 1932, in Washington, D.C.
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...
known for his research on long-range radio
Radio
Radio is the transmission of signals through free space by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space...
transmissions.
Austin was born in Orwell, Vermont
Orwell, Vermont
Orwell is a town in Addison County, Vermont, United States. The population was 1,185 at the 2000 census. Mount Independence was the largest fortification constructed by the American colonial forces...
, and educated at Middlebury College
Middlebury College
Middlebury College is a private liberal arts college located in Middlebury, Vermont, USA. Founded in 1800, it is one of the oldest liberal arts colleges in the United States. Drawing 2,400 undergraduates from all 50 United States and over 70 countries, Middlebury offers 44 majors in the arts,...
(class of 1889) and the University of Strasbourg
University of Strasbourg
The University of Strasbourg in Strasbourg, Alsace, France, is the largest university in France, with about 43,000 students and over 4,000 researchers....
(then in Germany
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...
), from which he received a Ph.D.
Ph.D.
A Ph.D. is a Doctor of Philosophy, an academic degree.Ph.D. may also refer to:* Ph.D. , a 1980s British group*Piled Higher and Deeper, a web comic strip*PhD: Phantasy Degree, a Korean comic series* PhD Docbook renderer, an XML renderer...
in 1893. From 1893-1901, he taught physics
Physics
Physics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...
as an instructor and assistant professor at the University of Wisconsin–Madison
University of Wisconsin–Madison
The University of Wisconsin–Madison is a public research university located in Madison, Wisconsin, United States. Founded in 1848, UW–Madison is the flagship campus of the University of Wisconsin System. It became a land-grant institution in 1866...
, then returned to Germany for two years at the Physikalisch-Technische Reichsanstalt
Physikalisch-Technische Bundesanstalt
The Physikalisch-Technische Bundesanstalt is based in Braunschweig and Berlin. It is the national institute for natural and engineering sciences and the highest technical authority for metrology and physical safety engineering in Germany....
in Berlin
Berlin
Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...
where he performed research on hot gases.
In 1904 Austin joined the National Bureau of Standards
National Institute of Standards and Technology
The National Institute of Standards and Technology , known between 1901 and 1988 as the National Bureau of Standards , is a measurement standards laboratory, otherwise known as a National Metrological Institute , which is a non-regulatory agency of the United States Department of Commerce...
to study radio propagation. After the United States Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...
established its Naval Radio Telegraphic Laboratory (later the Naval Research Laboratory) within the bureau, Austin served as its director from 1908-1923, and from 1923-1932 as chief of the Radio Physics Laboratory.
Austin's research focused on radio propagation
Radio propagation
Radio propagation is the behavior of radio waves when they are transmitted, or propagated from one point on the Earth to another, or into various parts of the atmosphere...
and static
Noise (radio)
In radio reception, noise is the superposition of white noise and other disturbing influences on the signal, caused either by thermal noise and other electronic noise from receiver input circuits or by interference from radiated electromagnetic noise picked up by the receiver's antenna...
, and more specifically the influence of temperature
Temperature
Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot...
, humidity
Humidity
Humidity is a term for the amount of water vapor in the air, and can refer to any one of several measurements of humidity. Formally, humid air is not "moist air" but a mixture of water vapor and other constituents of air, and humidity is defined in terms of the water content of this mixture,...
, magnetic storm
Magnetic storm
Magnetic storm can refer to:* A geomagnetic storm* Magnetic Storm , the title of a book of paintings by Roger Dean* Magnetic Storm , the title of an hourlong PBS NOVA documentary about Earth's changing magnetic fields...
s, and sunspot
Sunspot
Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They are caused by intense magnetic activity, which inhibits convection by an effect comparable to the eddy current brake, forming areas of reduced surface temperature....
s on long-range radio transmissions. Under his direction, the Navy conducted long-distance wireless measurements in 1909 and 1910 between the USS Birmingham
USS Birmingham (CL-2)
USS Birmingham , named for the city of Birmingham, Alabama, was a laid down by the Fore River Shipbuilding Company at Quincy, Massachusetts on 14 August 1905; launched on 29 May 1907; sponsored by Mrs L...
and USS Salem
USS Salem (CL-3)
USS Salem , Scout Cruiser No. 3, was a of the United States Navy. She was the first Navy ship named for the city of Salem, Massachusetts....
, as they steamed to Liberia
Liberia
Liberia , officially the Republic of Liberia, is a country in West Africa. It is bordered by Sierra Leone on the west, Guinea on the north and Côte d'Ivoire on the east. Liberia's coastline is composed of mostly mangrove forests while the more sparsely populated inland consists of forests that open...
and back, and Fessenden
Reginald Fessenden
Reginald Aubrey Fessenden , a naturalized American citizen born in Canada, was an inventor who performed pioneering experiments in radio, including early—and possibly the first—radio transmissions of voice and music...
's station at Brant Rock, Massachusetts. Austin measured received impulses from the ships on the 3,750 and 1,000 meter wavelengths to determine the relationships between radio frequency, distance, and received signal strength. These measurements led Austin and collaborator Dr. Louis Cohen to develop the empirical Austin-Cohen formula for predicting radio signal strength at long distances.
Austin joined the Institute for Radio Engineers (now IEEE) in 1913, in 1914 served as its third president, and in 1927 received its Medal of Honor
IEEE Medal of Honor
The IEEE Medal of Honor is the highest recognition of the Institute of Electrical and Electronics Engineers . It has been awarded since 1917, when its first recipient was Major Edwin H. Armstrong. It is given for an exceptional contribution or an extraordinary career in the IEEE fields of...
"for his pioneer work in the quantitative measurement and correlation of factors involved in radio wave transmission." He also served as a U.S. representative at numerous international radio conferences. Austin died on June 27, 1932, in Washington, D.C.
Washington, D.C.
Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....