Daikin P Series Technical Manual page 17

Sound Data
80
70
60
50
40
30
20
10
0
125
16
FTN30/35PS
250 500
Octave-band frequency (Hz)
T
H
M
L
Q
1000 2000
NC-70
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
4000 8000