Environmental noise levels and noise reduction in residential communities exposed to aircraft noise


Moses, N.; Zeitlin, O.

Journal of Sound and Vibration 43(3): 578-580

1975


The results are reported of measurements performed with a Bruel and Kjaer Sound Level Meter 2204 and a Nagra 4.2L Tape recorder, and a General Radio 1925 Real-Time 1/3rd Octave Analyzer in the residential communities adjacent to the Ben Gurion International Airport in Israel. The noise measurements were confined to only the take-off operations of aircraft. The residential constructions in the communities are 3-4 apartment buildings. The ground sideline distance of these buildings to the flight path was approximately 300 m. The measurement site was located approximately 4.5 km from the brake release point on the runway. Figures are presented which illustrate the location of the microphones. The results of noise measurements averaged as per each type of aircraft and then for all types of aircraft are tabulated.

Journal
of
Sound
and
Vibration
(1975)
43(3),
578-580
ENVIRONMENTAL
NOISE
LEVELS
AND
NOISE
REDUCTION
IN
RESIDENTIAL
COMMUNITIES
EXPOSED
TO
AIRCRAFT
NOISE
Further
to
the
results
reported
by
Ko
[1],
the
Acoustic
Department
of
Israel
Aircraft
Industries
Limited
would
also
like
to
report
the
results
of
similar
measurements
performed
in
November
1974.
Noise
measurements
were
performed,
with
a
Briiel
and
Kjaer
Sound
Level
Meter
2204
atitl.
a
Nagra
4.2L
Tape-Recorder
for
measurements
and
a
General
Radio
1925
Real-Time
1/3rd
Octave
Analyser
for
analysis,
in
the
residential
communities
adjacent
to
the
Ben
Gurion
International
Airport
in
Israel.
The
noise
measurements
were
confined
only
to
the
take-off
operations
of
aircraft.
The
residential
constructions
in
the
communities
are
3-4
floor
apartment
buildings
known
in
Israel
as
Shikunim.
The
ground
sideline
distance
of
the
residential
buildings
under
study
to
the
aircraft
flight
path
was
approximately
300
m.
The
measurement
site
was
located
approximately
4.5
km
from
the
brake
release
point
on
the
runway.
z
6
4
/*:
215
(3
. /
300
F
li
ght
00th
Figure
1.
Box
shaped
layout
of
buildings.
Microphone
locations:
1,
inside
enclosure—outside
apartments
2
m
from
nearest
building
wall;
2,
outside
enclosure
at
a
height
of
x
9
m
(distance
2
m
from
building
wall)
facing
aircraft
flight
path;
3,
inside
apartment
on
side
of
enclosure
(side
building)
on
1st
floor;
4,
inside
apart-
ment—far
side
of
enclosure
(side
building)
on
1st
floor;
5,
inside
apartment
complementary
to
microphone
2,
on
3rd
floor—far
side
of
enclosure;
6,
inside
apartment
complementary
to
microphone
2—near
side
of
en-
closure
on
3rd
floor.
,7
6
2
,
5
I
4
3.
3.0
Figure
2.
Row
type
layout
of
buildings.
Microphone
locations:
1,
outside
building
facing
aircraft
flight
path—height
1.2
m
above
ground
;
2,
outside
building
at
a
height
of
9
m
and
a
distance
of
2
m
from
building
wall
facing
aircraft
flight
path;
3,
inside
apartment
of
1st
floor
complementary
to
microphone
1
and
on
near
side
of
flight
path;
4,
inside
apartment
on
1st
floor
complementary
to
microphone
1
and
on
far
side
of
flight
path;
5,
inside
of
apartment
on
3rd
floor
complementary
to
microphone
2
and
on
near
side
of
flight
path;
6,
inside
of
apartment
on
3rd
floor
complementary
to
microphone
2
and
on
far
side
of
flight
path.
578
-20
I I I
f
I
1
Hoe
r•
NB
10
A
-
30
-
20
7/
41
/
-10
111-
0
LETTERS
TO
THE
EDITOR
579
The
microphones
were
located
as
shown
in
Figures
1
and
2.
The
outside
microphones
of
Figure
1
were,
respectively,
1.2
m
above
the
ground
inside
the
enclosure,
and
at
a
height
of
3
floors
(x
9
m)
outside
the
enclosure
facing
the
aircraft
flight
path.
All
microphones
were
at
a
distance
greater
than
2
m
from
all
building
walls.
The
outside
microphones
of
Figure
2
similarly
were
located,
respectively,
1.2
m
and
3
floors
(x
9
m)
above
the
ground
and
at
a
distance
from
the
building
walls.
Both
microphones
were
on
the
side
of
the
building
facing
the
aircraft
flight
path.
8
20
22
24
26
28
30
32
34
36
38
40
0
0
Frequency
(Hz)
Figure
3.
Building
noise
reduction
with
open
windows
for
building
layout
of
Figure
1.
Curve
A
shows
the
normal
average
level
differences
between
microphones
1-4,
and
2-5.
Curve
B
shows
the
average
level
differences
of
rooms
facing
enclosure,
i.e.,
between
1-3
and
2-6.
18
20
22
24
26 28
30
32
34
36
38
40
-
20
-10
10
b
7, 7,
kr)
-
Frequency
(Hz)
Figure
4.
Building
noise
reduction
with
open
windows
for
building
layout
of
Figure
2.
Curve
shows
the
level
differences
between
microphones
1-3,
1-4,
2-5
and
2-6.
8
20
22
24
26
28
30
32
34
36
38
40
Frequency
(Hz)
Figure
5.
Building
noise
reduction
with
closed
windows
for
building
layout
of
Figure
2.
Curve
shows
the
average
level
differences
of
microphones
1-3, 1-4,
2-5
and
2-6.
S
PL
(
dB
re
2
x
10
-
5
N
/m
2
)
S
PL
(dB
re
2x
10
-5
N
/m
2
)
SPL
(
dB
re
2x
10
-
5N
/m
2)
b
O
"6
"-
M
-
0
-
jo
I
I
/.
5
580
LETTERS
TO
THE
EDITOR
18
20
22
24
26
28
30
32
34
36
38
40
10
o
0
Frequency
(Hz)
Figure
6.
Building
noise
reduction
with
closed
windows
for
building
layout
of
Figure
1.
Curve
A
shows
the
normal
average
level
differences
between
microphones
1-4,
and
2-5.
Curve
B
shows
the
average
level
dif-
ferences
of
rooms
facing
enclosure,
i.e.,
between
microphones
1-3
and
2-6.
Additionally,
microphones
were
placed
inside
the
residential
apartments;
complementary
to
microphone
1
(of
Figure
1),
there
were
two
microphones,
one
in
the
room
facing
the
enclosure
and
the
other
in
the
room
exposed
to
the
outside.
Complementary
to
microphone
2
was
a
similar
situation.
Complementary
to
microphones
1
and
2
(of
Figure
2)
there
were
two
interior
microphones
also
as
mentioned
above.
The
results
of
noise
measurements
averaged
as
per
each
type
of
aircraft
and
then
for
all
types
of
aircraft
are
presented
in
Table
1
and
Figures
3,
4,
5
and
6.
TABLE
1
Exterior
noise
Figure
1
Microphone
1
(in
enclosure)
>
Microphone
2
(Outside
enclosure
9
m
above
ground)
dB(A)
dB(D)
63
125
250
500
1000
2000
4000
6.4
5.5
5.3
7.9
6.2
8.2
8.5
6.3
5.1
Figure
2
Microphone
1
<
Microphone
2
9.69
11.69
11.31
15.75
14.18
9.6
8.05
4.88
11.46
ACKNOWLEDGMENT
This
project
was
financed
by
and
performed
for
Mr
Warhaftig,
under
the
auspices
of
the
Israel
Ministry
of
Housing.
Acoustic
Department,
N.
MOSES
Israel
Aircraft
Industries
Limited,
0.
ZEITLIN
Ben-Gurion
International
Airport,
Israel
(Received
6
August
1975)
REFERENCE
1.
N.
W.
M.
Ko
1975
Journal
of
Sound
and
Vibration
38,
512-516.
Aircraft
noise
in
a
high-rise
city.
S
PL
(
dB
re
2
x
10
-
5
N/m
2)
-30
-20
-10