Table 1 Substrate-borne vibrations’ features from the impact hammer recorded during PD with the geophone at 8 and 50 m calculated on 536 and 315 strikes, corresponding to two days of experiments.

From: Pile driving repeatedly impacts the giant scallop (Placopecten magellanicus)

Distance (m)

Inter-pulse interval (s)

Rise time (s)

Acceleration peaks (dB re 1 µm·s-2)

Single strike exposure (dB re (1 µm·s-2)2·s )

Cumulative strike exposure (dB re (1 µm·s-2)2·s )

8

6.63 ± 0.61

0.08 ± 0.03

109.95 ± 1.25

94.39 ± 1.34

115.67 ± 0.65

50

6.94 ± 1.02

0.08 ± 0.01

87.08 ± 2.88

72.48 ± 2.51

93.13 ± 1.82

  1. Cumulative strive exposure levels at 8 and 50 m were calculated from, on average, 115 and 129 strikes, respectively. Values represent mean ± standard deviation.
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