Bergen B35:40, Project Manual

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Marine Propulsion Applications, B35:40 Noise measurement
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1.08
0315 B/P
N
OISE MEASUREMENT
B35:40 L/V
Estimated unsilenced exhaust noise
spectrum from RR B35:40V @ 1,0 m from
edge of the exhaust opening
Estimated Exhaust Noise from Engine
(1/1 octave band)
Estimated unsilenced exhaust noise
spectrum from RR B35:40V @ 1,0 m from
edge of the exhaust opening.
Estimated Exhaust Noise from Engine
(1/3 octave band)
Hz Lp dB(A)
31,5 97
63 104
125 113
250 122
500 120
1000 117
2000 113
4000 106
8000 91
Total 125
Hz Lp dB(A)
12,5 50
16 56
20 68
25 70
31,5 88
40 96
50 96
63 97
80 102
100 109
125 105
160 110
200 115
250 118
315 116
400 115
500 116
630 114
800 113
1000 112
1250 110
1600 108
2000 109
2500 106
3150 104
4000 100
5000 97
6300 91
8000 81
10000 76
12500 74
16000 69
20000 64
Total 125
Hz Lp dB(A)