Modeling marine mammal sound exposure levels due to ship traffic noise.

2010 ◽  
Vol 127 (3) ◽  
pp. 1725-1725
Author(s):  
Christian de Moustier ◽  
Michael B. Porter ◽  
Laurel Henderson
Keyword(s):  
Marine Mammal ◽  
Traffic Noise ◽  
Ship Traffic ◽  
Sound Exposure ◽  
Exposure Levels

Aircraft noise-induced awakenings are more reasonably predicted from relative than from absolute sound exposure levels

2013 ◽  
Vol 134 (5) ◽  
pp. 3645-3653 ◽  
Author(s):  
Sanford Fidell ◽  
Barbara Tabachnick ◽  
Vincent Mestre ◽  
Linda Fidell
Keyword(s):  
Aircraft Noise ◽  
Sound Exposure ◽  
Exposure Levels

Approximation of the Yearly Average Sound Level Based on the Sound Exposure Levels

2010 ◽  
Vol 96 (5) ◽  
pp. 981-984
Author(s):  
Rufin Makarewicz ◽  
Michal Galuszka
Keyword(s):  
Sound Level ◽  
Sound Exposure ◽  
Yearly Average ◽  
Exposure Levels

Measurement and Prediction of Sound Exposure Levels by University Wind Bands

2010 ◽  
Vol 25 (1) ◽  
pp. 29-34 ◽  
Author(s):  
Kris Chesky
Keyword(s):  
Linear Regression Analysis ◽  
Critical Role ◽  
Significant Proportion ◽  
Sound Exposure ◽  
Sound Levels ◽  
Wind Bands ◽  
Exposure Levels ◽  
The Mean ◽  
Over Time

The purpose of this study was to determine sound exposure levels generated in two college wind bands. Dosimeter data from a large sample of ensemble-based instructional activities (n = 43) was collected over time and processed to assess associations with predictor variables that may be relevant to this context, including indicators of time spend at various intensity levels, maximum and peak sound levels, degree of variability of sound levels over time, and the percentage of time playing music. The mean dose per event for the entire sample was 109.5% and ranged from 53.8% to 166.9%. Results of linear regression analysis revealed that regressors accounted for a significant proportion of the variance in dose (F = 128.42, p < 0.000) and a statistically significant and very large (96% variance accounted for) contribution to the prediction of dose. Findings implicate the critical role of the instructor and teaching pedagogy.

Observed cause‐effect relationships between measured aircraft sound exposure levels and various predictor variables

2005 ◽  
Vol 118 (3) ◽  
pp. 1888-1888
Author(s):  
Richard D. Horonjeff ◽  
David A. Senzig ◽  
Grant S. Anderson
Keyword(s):  
Predictor Variables ◽  
Sound Exposure ◽  
Exposure Levels

Controlled sound exposure experiments to measure marine mammal reactions to sound: Southern California behavioral response study

2013 ◽  
Vol 134 (5) ◽  
pp. 4043-4043 ◽  
Author(s):  
Brandon L. Southall ◽  
John Calambokidis ◽  
Moretti David ◽  
Jay Barlow ◽  
Stacy DeRuiter ◽  
...  
Keyword(s):  
Marine Mammal ◽  
Behavioral Response ◽  
Southern California ◽  
Sound Exposure

scholarly journals Sonar-induced temporary hearing loss in dolphins

2009 ◽  
Vol 5 (4) ◽  
pp. 565-567 ◽  
Author(s):  
T. Aran Mooney ◽  
Paul E. Nachtigall ◽  
Stephanie Vlachos
Keyword(s):  
Hearing Loss ◽  
Marine Mammals ◽  
Noise Exposure ◽  
Experimental Studies ◽  
Sound Exposure ◽  
Terrestrial Mammals ◽  
Behavioural Effects ◽  
Ocean Noise ◽  
Exposure Levels ◽  
High Sound

There is increasing concern that human-produced ocean noise is adversely affecting marine mammals, as several recent cetacean mass strandings may have been caused by animals' interactions with naval ‘mid-frequency’ sonar. However, it has yet to be empirically demonstrated how sonar could induce these strandings or cause physiological effects. In controlled experimental studies, we show that mid-frequency sonar can induce temporary hearing loss in a bottlenose dolphin ( Tursiops truncatus ). Mild-behavioural alterations were also associated with the exposures. The auditory effects were induced only by repeated exposures to intense sonar pings with total sound exposure levels of 214 dB re: 1 μPa 2  s. Data support an increasing energy model to predict temporary noise-induced hearing loss and indicate that odontocete noise exposure effects bear trends similar to terrestrial mammals. Thus, sonar can induce physiological and behavioural effects in at least one species of odontocete; however, exposures must be of prolonged, high sound exposures levels to generate these effects.

scholarly journals Farmed Salmon Show No Pathological Alterations When Exposed to Acoustic Treatment for Sea Lice Infestation

2021 ◽  
Vol 9 (10) ◽  
pp. 1114
Author(s):  
Marta Solé ◽  
Maria Constenla ◽  
Francesc Padrós ◽  
Antoni Lombarte ◽  
José-Manuel Fortuño ◽  
...  
Keyword(s):  
Sound Pressure ◽  
Sea Lice ◽  
Histopathological Analysis ◽  
Microscopy Imaging ◽  
Farmed Salmon ◽  
Sound Exposure ◽  
Innovative Method ◽  
Exposure Levels ◽  
Exposure Sessions ◽  
Acoustic Treatment

The use of bioacoustic methods to address sea lice infestation in salmonid farming is a promising innovative method but implies an exposure to sound that could affect the fish. An assessment of the effects of these techniques related to the salmon’s welfare is presented here. The fish were repeatedly exposed to 350 Hz and 500 Hz tones in three- to four-hour exposure sessions, reaching received sound pressure levels of 140 to 150 dB re 1 µPa2, with the goal of reaching total sound exposure levels above 190 dB re 1 µPa2 s. Gross pathology and histopathological analysis performed on exposed salmons’ organs did not reveal any lesions that could be associated to sound exposure. The analysis of their otoliths through electron microscopy imaging confirmed that the sound dose that was used to impair the lice had no effects on the fish auditory organs.

scholarly journals Narwhals react to ship noise and airgun pulses embedded in background noise

2021 ◽  
Vol 17 (11) ◽  
Author(s):  
Outi M. Tervo ◽  
Susanna B. Blackwell ◽  
Susanne Ditlevsen ◽  
Alexander S. Conrad ◽  
Adeline L. Samson ◽  
...  
Keyword(s):  
High Frequency ◽  
Background Noise ◽  
Site Fidelity ◽  
Anthropogenic Activities ◽  
The Arctic ◽  
Exposure Study ◽  
Sound Exposure ◽  
Monodon Monoceros ◽  
Exposure Levels ◽  
Extreme Sensitivity

Anthropogenic activities are increasing in the Arctic, posing a threat to niche-conservative species with high seasonal site fidelity, such as the narwhal Monodon monoceros . In this controlled sound exposure study, six narwhals were live-captured and instrumented with animal-borne tags providing movement and behavioural data, and exposed to concurrent ship noise and airgun pulses. All narwhals reacted to sound exposure with reduced buzzing rates, where the response was dependent on the magnitude of exposure defined as 1/distance to ship. Buzzing rate was halved at 12 km from the ship, and whales ceased foraging at 7–8 km. Effects of exposure could be detected at distances > 40 km from the ship.At only a few kilometres from the ship, the received high-frequency cetacean weighted sound exposure levels were below background noise indicating extreme sensitivity of narwhals towards sound disturbance and demonstrating their ability to detect signals embedded in background noise. The narwhal's reactions to sustained disturbance may have a plethora of consequences both at individual and population levels. The observed reactions of the whales demonstrate their auditory sensitivity but also emphasize, that anthropogenic activities in pristine narwhal habitats needs to be managed carefully if healthy narwhal populations are to be maintained.

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