Daikin FTV-A Series Engineering Data page 63

Sound Pressure Level
Model Speed
High
Med
FTV50A
Low
Quiet
NC Curve
90
80
70
60
50
40
30
20
10
APPROXIMATE
THRESHOLD HEARING FOR
CONTINUOUS NOISE
0
63
1/1 Octave A-weighted Sound Pressure Level (dB, ref 20µPa)
125Hz 250Hz 500Hz
44 41 38
40 39 35
37 36 32
35 33 30
125 250 500
OCTAVE BAND CENTER FREQUENCY (Hz)
1kHz 2kHz 4kHz
37 34 28
34 30 23
30 26 19
28 23 16
NC-70 NC-70 NC-70
NC-60 NC-60 NC-60
NC-50 NC-50 NC-50
NC-40 NC-40 NC-40
NC-30 NC-30 NC-30
NC-20 NC-20 NC-20
1k 2k 4k
Sound Level
Overall
(dBA) Criteria
8kHz
18 42
14 38
13 35
12 33
HIGH (H)
MEDIUM (M)
LOW (L)
QUIET (Q)
8K
3D122801
Noise
36
33
29
26
61