WinGD X72DF - Page 224

Marine Installation Manual 2021-08 7-5
7 Engine Emissions
7.2 Engine noise
X72DF
Figure 7-4 Sound pressure level at 1m distance from engine
SM-0141
31.5 63 125 250 500 1k 2k 4k 8k
120
1
10
100
90
80
70
Octave band centre frequency in [Hz]
Lp [dB]
NR80
90
110
120
40
50
NR70
60
30
1) 8X72DF
2) 5X72DF
31.5 63 125 250 500 1k 2k 4k 8k
120
1
10
100
90
80
70
Octave band centre frequency in [Hz]
Lp [dB]
NR80
110
120
40
50
NR70
60
30
100
Overall
average
LpA in dB(A)
LpA in dB(A)
1) 2)
1)
2)
1)
2)
1) 2)
1)
2)
1)
2)
1) 8X72DF
2) 5X72DF
Max. overall
single point
Airborne sound pressure levels
with standard noise reduction
Overall
average
Max. overall
single point
Airborne sound pressure levels
with additional noise reduction