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FRITZ INGERSLEV
1912-1994
BY PER V. BRUEL
THE ACOUSTICAL SCIENTIFIC COMMUNITY has lost a great person-
ality "noise professor" Fritz Ingerslev, who diec! on February
5, 1994, at the age of eighty-one. The title "noise professor"
characterizes Fritz Ingerslev well. He was not only a famous
and cledicated professor who worked industriously with tech-
nical research projects, but he also managed to simplify for
the layman difficult concepts in acoustics en cl especially noise.
It is, to a great extent, due to the achievements of Professor
Ingerslev that highly effective work is carried out in today's
Europe to prevent en c! solve noise problems.
Professor Ingerslev was born in Aarhus, Denmark, on July
6, 1912. He received his doctorate in electrical engineering
from the Technical University of Denmark in 1936. In 1945 he
became head of the Acoustical Laboratory at the Academy of
Technical Sciences, where he served until 1981. From 1954 to
1982 Fritz TngersTev was both professor of builcling acoustics
at the Technical University of Denmark en c! the head of the
Acoustics Laboratory at the university. From 1955 to 1963 he
was chairman of the Danish Acoustical Society, which he him-
self had founded. Professor Ingerslev was highly motivated for
international cooperation. It was quite natural that he became
a long-time member of the coordinating committee for the
International Congress on Acoustics, which was founcled in
1951. From 1974 to 1987 he was the founder and president of
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128
MEMORIAL TRIBUTES
the International Institute of Noise Control Engineering,
which has organized INTER-NOISE each year since 1972.
Ingerslev was president for INTER NOISE in 1973. He was
electec! a foreign associate of the U.S. National Academy of
Engineering in 1982. Professor Ingerslev was the author of
more than fifty technical publications.
Fritz Ingerslev's career starter! when Professor P. O. Peder-
son, who was then the headmaster of the Technical University
of Denmark (Den Polytekniske Laereanstalt), decided to con-
centrate on research activities in acoustics ant! emphasize the
teaching of room acoustics. In 1941 the Acoustical Laboratory
was founded under the Academy of Technical Sciences and a
few years later it came under his daily leaclership. In 1949
Ingerslev's book on building acoustics for engineers was pub-
lished, and in 1953 his Ph.D. thesis on distortion in
electrod,vnamic loudspeakers. In 1954 Ingerslev was appoint-
ed professor of acoustics. Under his leadership, laboratory
activities increased significantly as well as the interest in the
teaching of acoustics. It is solely due to Ingerslev's merits and
his indefatigable struggle for his profession that the Danish
Technical University today has one of Europe's largest anecho-
ic chambers for teaching and research purposes.
Ingerslev tract a special interest for international
standardization. From the early 1950s he was active in the
International Electrotechnical Commission (IEC) Committee
of Electroacoustics, where he was deeply involved with the
international standards for hearing aicis. Later it became his
task, as the chairman of the International Stanciarcis
Organization (ISO) Acoustic Committee over a period of
twenty years, to coordinate the international points of view
and formulate common standards for sound and especially
various types of noise measurements. The contagious effects
of his enthusiasm on his fellow workers in Danish industry can
be seen from the high Danish influence on international
standardization for acoustics. The secretariats for both IEC's
and ISO's acoustic committees are administered by the Danish
Standards Association.
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FRITZ INGERSLEV
129
Professor IngersTev's expertise, combined with his incredi-
ble involvement in the struggle to protect the incliviclual from
noise pollution, macle him well known. Large traffic projects-
for example, expansion of Kastrup Airport in
Copenhagen were originally planned without due consider-
ation to the serious noise problems it wouIc! cause for the
nearby community. It was Ingerslev's way of dealing with these
problems that made the authorities realize how serious a
threat noise could be to the environment. It often required
untiring efforts and a good portion of pedagogy to reconcile
technical scientific results to the authorities. Because of his
success, directives for noise protection are in place today.
Professor Ingerslev was deeply involved in the pioneering
work for the present Danish Ministry for the Environment
and was instrumental in formulating twenty years ago a
farsighted environmental policy, which is used as a mode! in
many countries today.
Fritz Ingerslev was a great initiator, who not only could in-
spire his coworkers en c! the students at the Danish Technical
University, but also knew how to struggle politically for his
profession. The Danish electroacoustic industry, research, and
education have much to thank him for. Those who continue
development of the acoustic field today are deeply indebted
to Professor Tngerslev. His efforts and international reputa-
tion will be remembered for many years.
Representative terms from entire chapter:
professor ingerslev
