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Page Title:
Table 2. Sound pressure levels associated with bucket dredging cycle events measured at increasing distances from the source ... |
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 ERDC TN-DOER-E14
August 2001
Table 2
Sound pressure levels associated with bucket dredging cycle events measured
at increasing distances from the source during dredging operations in Cook
Inlet, Alaska
Sound Pressure Levels for Distinct
Distance
Dredging Cycle Events, dB
from
Time
Source
Bottom
Bucket
Bucket
Winch
Barge
Session
Cycle
min:sec
m
Contact
Digging
Closing
In/Up
Loading
11
1
0:13
,158
124.01
113.24
99.25
116.57
108.59
11
3
2:34
,213
122.29
114.29
102.50
116.29
103.52
11
5
4:42
,250
114.94
115.93
103.85
112.69
107.15
11
7
6:51
,299
121.58
111.13
--
113.09
97.72
11
9
8:54
,344
115.35
120.17
--
115.80
108.01
11
11
11:02
,401
120.81
113.89
103.73
112.25
95.04
11
13
13:14
,464
117.02
107.70
104.61
110.78
94.54
15
32
47:08
,508
116.91
110.17
--
108.72
86.39
15
28
43:05
,552
119.35
112.70
103.95
107.09
93.25
15
39
54:09
,607
122.33
108.95
102.72
107.10
--
15
25
39:37
,652
117.62
111.40
109.12
103.39
--
15
23
37:30
,712
118.41
110.14
91.50
111.82
--
15
22
36:26
,783
117.39
108.97
99.26
110.09
89.49
15
19
33:27
,888
118.94
107.52
94.61
106.48
87.33
15
17
31:27
1,065
115.69
107.96
--
102.90
--
15
16
30:32
1,114
113.50
103.70
--
100.99
--
15
15
29:31
1,182
107.45
104.07
--
96.38
82.47
15
13
27:19
1,313
113.52
110.81
104.46
94.73
--
15
12
26:18
1,404
108.14
108.17
98.84
96.34
--
15
11
25:13
1,482
115.29
110.69
99.49
98.01
--
15
7
21:11
1,751
103.28
104.50
89.12
101.69
--
15
5
19:08
1,965
108.54
100.83
--
103.24
--
8
7
6:32
3,017
116.94
95.11
84.52
--
--
8
1
0:56
3,586
101.03
--
--
--
--
6
11
10:56
4,589
102.7
95.12
--
--
--
6
6
5:53
5,036
94.97
94.97
--
--
--
14
2
1:09
5,479
100.33
98.78
93.87
--
--
8
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