11
Sound Data
NC Curve
0
10
20
30
40
50
60
70
80
125 250 500 1000 2000
4000 8000
S
ound pr
essur
e
lev
el
(d
B,
re
f 20
μ
Pa
)
Octave-band frequency (Hz)
FTK25JXV19 / FTXN25JXV1
NC-20
NC-30
NC-25
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
H
M
L
0
10
20
30
40
50
60
70
80
125 250 500 1000 2000 4000 8000
Octave-band frequency (Hz)
FTK35JXV19 / FTXN35JXV1
NC-20
NC-30
NC-25
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
H
M
L
S
ound pr
essur
e
lev
el
(d
B,
re
f 20
μ
Pa
)