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12
Sound Data
0
10
20
30
40
50
60
70
80
125
250
500
1000
2000
4000
8000
S
ound
p
re
ss
ur
e
le
ve
l (
dB
, r
ef
20
µP
a)
Octave-band frequency (Hz)
FTXS50A
NC-20
NC-30
NC-25
NC-35
NC-40
NC-45
NC-50
NC-55
NC-65
NC-60
NC-70
Q
0
10
20
30
40
50
60
70
80
125
250
500
1000
2000
4000
8000
S
ound
p
re
ss
ur
e
le
ve
l (
dB
, r
ef
20
µP
a)
Octave-band frequency (Hz)
FTXS60A
NC-20
NC-30
NC-25
NC-35
NC-40
NC-45
NC-50
NC-55
NC-65
NC-60
NC-70
Q