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Suzsnno Brown, assistant director of
programming for the Nebraska Union; fcss
tcrr.pcrtri!y vacated her position to
become acting assistant to Ron Gicrhan,
acting vice chancellor for student
affairs.
The lengthy, rather confusing title of
Erowns office was created when former
Vice Chancellor for Student Affairs
Ken Bader left his position Oct. 1 to
become president of the American
Soybean Association. Gierhan was appoint
ed acting vice chancellor, and Brown has
been named temporarily to fill Gicrhan's
post.
Besides assisting and advising Gierhan
on any projects or problems dealing with
student affairs Brown also will serve as
representative for the Office of Student
Affairs on severd committees. Tlsose
include the Council on Student life,
the Student Affdrs Staff Development
Committee and the Career Action
Committee (CAC).
Brown has a specfcl Interest in CAC
because she was a member of an ad hoc
committee that first initiated the program
two years ago.
Sara Boatman . and Gary Gilder;
assistant programming advisers for Union
Program Council (UPC), will take charge of
Brown's vacated position as UTC pro
gramming adviser. Brown has served as
adviser for four years.
Boatman and Gflger will receive a
stipend for their increased workload,
according to Union Director Allen Bennett.
Bennetf will assume Brown's other pro
gramming duties.
Annoying noise can b$. cut
by planting, professor says
Irritating traffic noise often can be cut
in half by selective planting of trees and
shrubs, said a UNL engineering mechanics
professor who has been studying the
problem for eight yean.
. Prof. D. L Cook is conducting research
in cooperation with the VS. Department
of Agriculture (Forest Service) to find
ways to control noise by using tree and
shrub barriers. -
"Traffic noise constitutes a social rather
than a medical problem, Cook said. "We
are dealhg with irritation noise levels,
not hearaig-damaging levels. Daytime
levels above 70 decibels generally are con
sidered annoying, he said. -
The research consisted of three separate
studies financed through the UJSr Forest
Service for about $S9,C03. Initiated in
Minnesota in response to interest expressed
by the Forest Service, the project was later
shifted to the Colorado Rocky Mountain
Forest and Range Experiment Station
si Fort Collins, Colo.
' "People employed by this station knew
I had experience in noise studies, Cook
said. After preliminary studies to deter
mine the value of the research, Cook
applied for the first of three grants.
. Sisdcsts Itflped
Working with Cook were -David Van
Haverbeke, a research forester from the
station at Fort Collins, and three UNL
students.
"The students were all .very good and
Van Haverbeke has been as involved as I
have. It was a cooperative effort, Cook
said.
Although the third study has not been
completed, Cook said" some conclusions
could be drawn. ;
"I personally think a combination of
trees and some sort .of solid barrier is the
best compromise solution in a majority of
cases, he said. "Trees are not the only
way to control noise, but in many
- situations they are the fesst means avail-'
able.
The studies showed that wide belts of :
trees planted 25 to 50 feet from the noise
source effectively screen highway traffic
noise. Construction of dirt dikes can pro
vide immediate relief from noise before the
trees grow tall enough, Cock said.
SmsSar trees ssstsd -
To reduce suburban traffic isoise,
Cook suggested planting smaller, higher
density trees 15 to 20 feet from the noise
source. However, he said that barriers were
not effective in controlling noise from large
trucks.
Because little previous work has been
done csi the subject, the first study was
Otute general. Cock add. Conducted 100
miles northwest cf Lincoln in the Flstte
Valley area, it experimented with the use
cf trees and shrubs in noiss abatement
- The second study ceabiaed trees tad;
dirt dikes to form btnkrs ;sxd wes con
ducted in Hastings. .
Existing shelterbelts were used in the
first and second studies, Cook said, but
because suitable natural sites were difficult
to find, the shelterbeH in Hastings was
modified by constructing a dirt dike with
in the belt.
Tape-recorded truck noise was used as a
noise source in. the first two studies,
although actual traffic noise was used
almost exclusively as a source in the final
study, he said.
Cook is completing the third study of
suburban traffic noise on South 56th
Street between A Street and Valley Road
in Lincoln. He said many residents whose
backyards face 56th Street have used trees
or wooden fences as visual screens, wliich
also helped reduce noise levels.
' Results of the research have been dis
tributed to forestry organizations, highway
planners and environmental groups
interested in, reducing noise, Cook said.
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