Underwater Sound Levels (IMAGE)

NOAA Fisheries West Coast Region

Underwater Sound Levels

Caption

These are predicted 50Hz noise levels at 30 meters depth from August to November 2009. Noise predictions were categorized using an estimate of pre-industrial noise conditions (65dB) and the 10th, 50th, and 90th percentiles of the predictions. These categories corresponded to measurements of shipping traffic volumes: pre-industrial, low (pre-industrial to 10th percentile of predicted noise levels), moderate (10th to 50th percentiles of predicted noise levels), heavy (50th to 90th percentiles of predicted noise levels), and extreme (>90th percentile of predicted noise levels).

Credit

Redfern et al., Endangered Species Research

Usage Restrictions

CREDIT: Redfern et al., Endangered Species Research

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