Daikin FTV-A Series Engineering Data page 64

Sound Level
Sound Pressure Level
Model Speed
High
Med
FTV60A
Low
Quiet
NC Curve
90
80
70
60
50
40
30
20
10
APPROXIMATE
THRESHOLD HEARING FOR
CONTINUOUS NOISE
0
63
62
1/1 Octave A-weighted Sound Pressure Level (dB, ref 20µPa)
125Hz 250Hz 500Hz
43 43 40
41 40 37
38 38 35
37 37 34
125 250 500
OCTAVE BAND CENTER FREQUENCY (Hz)
1kHz 2kHz 4kHz
40 38 31
36 34 26
34 31 23
32 30 22
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
Overall
(dBA) Criteria
8kHz
19 44
16 41
14 39
13 37
HIGH (H)
MEDIUM (M)
LOW (L)
QUIET (Q)
8K
3D122802
Noise
39
35
33
31