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2-C
... . The Summerville News, Thursday, June 26, 1986
Fighter Pilots Will React
Much Faster In Future
. The fig pilot races his
@ ‘enemy lines toward
‘m& enly, a warninfi
‘monitor il;luh!:r:o&;l "1t take
it. It takes
him perilous seconds to see
that a missile is approaching
from his left. He has only a mo
ment to react and perhaps save
l‘i.imtikcockpit. f the fut
n of the future,
fi"“ will have a better chance
survive. Military planners
think this is vital, since the
U.S. has fewer planes and
g‘ilots than the Soviet Union.
he Department of Defense is
now funding research to
simplify cockpit designs. With
these improvements, American
flyers should be able to spot
and respond to danger more
quickly.
At the Georgia Tech
Research Institute, researchers
are develog\ing a warning
system to show pilots where
trouble is by sound instead of
sight.
“The pilot would hear a
sound in his helmet earphones
which seemed to come from the
direction of the threat,” says
Dr. Ted Doll, the director of
this project. It would be like
hearing the approaching
missile. He could react much
more directly.”
Doll says that the human
ears are a powerful tool for
locating objects from sound.
“Working together, they can
home in on a noise to within a
sin%le degree,” he said.
n the natural world, a
listener senses direction a
sound comes from through a
variety of almost imperceptible
clues. For one thing, sound
does not strike the two ears
(glite at the same time. Also,
the fleshy outer part of the ear
muffles sounds coming in from
different angles in distinctive
ways.
Sounds hitting the ear
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Thursday Through Monday: June 26 - June 30
Thursday and Monday 10:00 a.m. - 6:00 p.m. ’
Friday and Saturday 10:00 a.m. - 8:00 p.m. i
Sunday 12:30 - 5:00 p.m. :
14 Trion Road — Summerville .
throufh earphones offer no
such locational clues. Anyone
who has listened to a stereo
this way knows that the music
seems to come from no par
ticular direction.
- To show that sounds in ear
hones can have *‘location,”
&eorgia Tech researchers plac
eda mannoqhuin in a laboratory
with microphones in each ear.
A circle of stereo speakers sur
rounded this dummy. When
the researchers wanted to
create a sound direct.li'l in front
of the mannequin, they trig
gered the speaker at the 12
o'clock position. The resulting
sound was picked up on the
microphone in the manne%uin's
ears and p%&ed into an adjoin
ing lab. There, a series of
human subjects wearing pilot's
helmets heard the cues through
earphones. They were able to
point out the direction the
sound seemed to come from.
Previous attempts to do
this failed because human sub
jects were not allowed to wag
gle their heads from side to
side. This is an important ele
ment in localizing sound, says
Doll. “In the natural worl}('i.
human hearing works very
much like a radar system. You
can compare the outer ear to an
antenna dish mounted on a
moveable pedestal, the head.
The head moves back and
forth, allowing the ear to zero
in on the location of a target.”
The problem with allowing
head movements while a sub
ject wears earflhones is that
the position of the sound shifts.
If tgg listener moves his head
15 degrees to the left, he carries
the sound 15 degrees in the
same direction.
_Tech engineers solved this
difficulty by compensating for
each subject’s head
movements. They placed a
trackin% device over his
helmet. Each head movement
was re?orted to a central com
puter. If the movement was 15
degrees left, the computer
changed the speaker beeping in
the adjacent lab by 15 degrees.
**ln this way, the sound ap
pears to remain in the same
relative position,”” Doll saf's.
The system is still a
laboratory simulation.
However, Tech researchers
have proved that a warnin, fi
sl\"stem which localizes soun
t rou%h headphones is grac
tical. The next stefi is to build
a prototype which uses elec
tronic sound cues with direc-
tional qualities.
This program was spon
sored by the Air Force's Arm
strong Medical Research
Laborat,orK under a subcon
tract with MacAuly-Brown
Inc. Doll's ’Froup team works
out of Tech's Systems
Eng’neering Laboratory.
esides its obvious military
uses, directional sound warn
ings would also be useful in
civilian aircraft. Thefi could
even be used by the blind in
learning to orient themselves
to new spaces.
Research of this kind may
produce improvements in pilot
performance which seem
minimal on the surface. But in
a business where seconds sav
ed are vital, any improvement
in reaction time is important.
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JOHN HALL
Hall Named
To DJC List
John Daniel Hall, Trion,
has been named to the spring
guarter dean'’s list at Dalton
unior College.
Hall, a part time student,
was among 231 full time and
part time students included on
the honor list released by Dr.
Wayne Bell, academic dean at
DIC.
To be named to the full time
dean’s list a student must |
achieve an overall grade point l
average of 3.5 out of a possible |
4.0. A course load of 12 or more
credit hours constitutes a full
time schedule.
Part time students must
also achieve a 3.5 grade point
average and carry between 5
and 11 credit hours. |
Shankles Honored
Jamie A. Shankles, Sum
merville, was named to the
wfing quarter dean’s list at
est Georgia College,
Carrollton.
To be placed on the list, a
student must complete the
quarter with a 3.5 grade point
average out of a possible 4.0.
Fowler
Friday
Speaker
Fifth District Rep.
Wyche Fowler, a
Democratic candidate for
the U. S. Senate seat now
held by Republican incum
bent Mack Mattin%ly, will
be in Chattooga County
Friday.
Fowler will address the
noon meetinvg of the
Summerville-Trion Op
timist Club at The Round
Table, Pennville.
.
Dean’s List
Davin Meadows, son of Car
thell and Linda Meadows,
Trion, has been named to the
honor roll for the spring
%uarter at North Georgia
echnical and Vocational
School, Clarkesville.
Davin attended Chattooga
High School.
o
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PRICES EFFECTIVE THURSDAY, JUNE 26
THROUGH MONDAY, JUNE 30, 1986
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HAVOLINE 30 WT. OR 10-W-40 c
Motor Oil.-o. 88
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; f‘é‘ Lettuce .
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Bradley
Promoted
By Army
William F. Bradlex. Sum
merville, was recently pro
moted to staff sergeant in the
Army Reserve.
Bradley is a member of the
3397th U. S. Army Garrison in
Chattanooga, Tenn.
Heis emslogad in Trion b{
Riegel Textile Corp. as a for
lift truck operator in the cloth
warehouse.
Bradley began his military
career in January, 1967 and
while on active duty had a tour
of duty in Vietnam. He served
in the reserve from July, 1973
to June, 1976 and from July,
1981 until the present time.
At the Garrison, Bradley
works in the Directorate of
Communication Electronics as
a shift supervisor.
He lives in Summerville
with his wife, Katherine, and
their children, Chris, Melanie
and Julia.
Coca-Cola, Cherry Coke,
Diet Coke, Sprite,
Dr Pepper, Tab, Sunkist
And Mello Yello
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William F. Bradley (right), Summerville,
is shown being promoted to staff sergeant
by Col. William C. Waldrup, Jr., com
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LUCKY’S
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Summerville Man Promoted
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