One year of background underwater sound levels in Haro Strait, Puget Sound

2005 ◽  
Vol 117 (4) ◽  
pp. 2577-2578 ◽  
Author(s):  
Val Veirs ◽  
Scott Veirs
Keyword(s):  
Puget Sound ◽  
Underwater Sound ◽  
Sound Levels ◽  
One Year

scholarly journals Underwater sound levels in the Canadian Arctic, 2014–2019

2021 ◽  
Vol 168 ◽  
pp. 112437
Author(s):  
William D. Halliday ◽  
David Barclay ◽  
Amanda N. Barkley ◽  
Emmanuelle Cook ◽  
Jackie Dawson ◽  
...  
Keyword(s):  
Canadian Arctic ◽  
Underwater Sound ◽  
Sound Levels

A Model Based Assessment Of Underwater Sound Levels During A Seismic Source Soft-Start Operation

2010 ◽  
Author(s):  
David Hannay ◽  
Roberto Racca ◽  
Scott Carr ◽  
Mike Jenkerson ◽  
Rodger Melton ◽  
...  
Keyword(s):  
Seismic Source ◽  
Underwater Sound ◽  
Model Based ◽  
Soft Start ◽  
Sound Levels

Return of One-year-old Pink Salmon to a Stream in Puget Sound

1981 ◽  
Vol 43 (1) ◽  
pp. 31-31 ◽  
Author(s):  
Robert W. Foster ◽  
Carrie Bagatell ◽  
Howard J. Fuss
Keyword(s):  
Pink Salmon ◽  
Puget Sound ◽  
One Year

Biology and Management of Dogfish Sharks

2009 ◽  
Keyword(s):  
Reproductive Cycle ◽  
Reproductive Tract ◽  
Puget Sound ◽  
Squalus Acanthias ◽  
Spiny Dogfish ◽  
Embryo Size ◽  
Adult Females ◽  
Males And Females ◽  
One Year ◽  
Appearance Changes

Abstract.—The fishery for spiny dogfish <em>Squalus acanthias </em>in Washington State has been ongoing for over a century. Management efforts have historically been limited and recent interest in increasing management efforts has led to renewed interest in the biology of the species. This project was undertaken to aid in management by describing the reproductive cycle of the dogfish in Puget Sound. Reproductive tracts were sampled from 170 male and 358 female dogfish from the catch of a commercial trawler over one year. Size at 50% maturity was 89.9 cm for females and 74.1 cm for males (total length extended). Reproductive stages were developed for adult females based on the proportion of yolk absorbed by the developing embryo. Size, weight, and appearance changes in the reproductive tract for both males and females throughout maturation and reproduction are described. There did not appear to be a significant seasonality to the reproductive timing, in that the onset of pregnancy and pupping were observed year round, however, peaks in activity were observed in December for the onset of pregnancy and October for pupping.

Prediction and Monitoring of Underwater Sound Levels from the Implosion of a Reinforced Concrete Bridge Pier

2017 ◽  
Vol 2628 (1) ◽  
pp. 47-57
Author(s):  
Paul R. Donavan ◽  
James Reyff ◽  
Carrie Janello
Keyword(s):  
San Francisco ◽  
Peak Pressure ◽  
Underwater Sound ◽  
Surface Reflection ◽  
Sound Exposure ◽  
Reinforced Concrete Bridge ◽  
Sound Levels ◽  
Exposure Levels ◽  
And Performance ◽  
Peak Pressures

After the completion of the new east span of the San Francisco–Oakland Bay Bridge in California, large concrete piers of the old span needed to be demolished. To consider using controlled blasting for this action, hydroacoustic levels were predicted and monitored with regard to specified fish and marine mammal criteria. The metrics included peak pressure and sound exposure levels at distances from 25 to more than 4,000 ft from the pier. For peak pressure, the measured levels were slightly higher than estimated, although for sound exposure levels, the measured levels were somewhat lower than estimated because of the effect of surface reflection. A blast attenuation system consisting of a wide bubble stream was used to minimize the hydroacoustic levels in the water surrounding the pier. The implosion event consisted of 588 individual charge detonations ranging from 35 to 21 lb (15.9 to 9.5 kg/delay) spaced 9 ms apart. Although there were 135 individual detonations of the larger 35-lb charges, the highest peak pressures varied in level by 10 to 15 dB during the course of the implosion. The methods for predicting the levels, measured results, analysis of data, and performance of the blast attenuation system are reviewed.

Prediction of underwater sound levels from rain and wind

2005 ◽  
Vol 117 (6) ◽  
pp. 3555-3565 ◽  
Author(s):  
Barry B. Ma ◽  
Jeffrey A. Nystuen ◽  
Ren-Chieh Lien
Keyword(s):  
Underwater Sound ◽  
Sound Levels
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