Measuring Underwater Background Noise in High Tidal Flow Environments

Journal Article

Title: Measuring Underwater Background Noise in High Tidal Flow Environments
Publication Date:
January 01, 2013
Journal: Renewable Energy
Volume: 49
Pages: 4
Publisher: Elsevier
Stressor:
Technology Type:

Document Access

Website: External Link

Citation

Willis, M.; Broudic, M.; Haywood, C.; Masters, I.; Thomas, S. (2013). Measuring Underwater Background Noise in High Tidal Flow Environments. Renewable Energy, 49, 4.
Abstract: 

Understanding the effect of marine energy development on the underwater noise levels in a proposed installation area forms a crucial part of any Environmental Impact Assessment. This paper uses boat-based hydrophone survey data taken from an area subject to tidal currents up to 3 m s-1 and deter-mines how the background noise levels change with tidal flow and flow direction. It was found that a more meaningful expression of background noise was gained by reference to “Power level” as measured by the Root Mean Square of the spectrum. Hydrophone measurements were taken during low season (with respect to other maritime activity) and in high season over the entire tidal cycle. Back-ground noise levels ranged between 72 and 108 dB re 1 µPaRMS with higher sound pressure levels occurring at frequencies below 100 Hz. Background noise levels increased with increasing tidal flow and were higher on ebb tides than flood tides.

 

Click here for more information on Ramsey Sound. 

Find Tethys on FacebookFind Tethys on Twitter
 
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.