Sound Levels - Sinclair SDV5 Series Service Manual

9 Sound Levels

9.1 Overall
Table 9.1: High Static Pressure Duct sound pressure levels
Model name
SSH
SDV5-71DHA 46
SDV5-80DHA 46
SDV5-90DHA 50
SDV5-112DHA 50
SDV5-140DHA 53
SDV5-160DHA 54
SDV5-200DHA 57
SDV5-250DHA 57
SDV5-280DHA 57
Notes:
1. Sound pressure levels are measured 1.4m below the unit in a semi-anechoic
chamber. During in-situ operation, sound pressure levels may be higher as a
result of ambient noise.
9.2 Octave Band Levels
Figure 9.2: SDV5-71,80DHA octave band levels
80
70
60
SSH
50
SH
H
M
L
40
SL
SSL
30
20
10
0
63 125 250
Octave band center frequency (Hz)
201806
1
Sound pressure levels dB(A)
SH H M L
46 45 45 44
46 45 45 44
49 48 48 47
50 49 48 47
52 51 51 50
54 53 52 51
56 55 54 53
56 55 54 53
56 55 54 53
500 1000 2000 4000 8000
Figure 9.1: High Static Pressure Duct sound pressure level
measurement
SL SSL
43 42
43 42
46 45
46 45
49 48
50 50
52 50
52 50
52 50
Figure 9.3: SDV5-90DHA octave band levels
80
70
NC65
60
NC60
SSH
SH
NC55
50
H
M
NC50
L
SL
NC45
40
SSL
NC40
NC35
30
NC30
NC25
20
NC20
NC15
10
0
63 125 250 500 1000 2000 4000 8000
Octave band center frequency (Hz)
NC65
NC60
NC55
NC50
NC45
NC40
NC35
NC30
NC25
NC20
NC15
29