Pinniped Bioacoustics Auditory Mechanisms Temporary Threshold Shift And Effects Of Noise On Signal Reception PDF Download

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Pinniped Bioacoustics: Auditory Mechanisms, Temporary Threshold Shift, and Effects of Noise on Signal Reception

Pinniped Bioacoustics: Auditory Mechanisms, Temporary Threshold Shift, and Effects of Noise on Signal Reception
Author:
Publisher:
Total Pages: 0
Release: 2001
Genre:
ISBN:

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The data obtained during this award period provide comparative measurements of underwater and aerial hearing sensitivity in pinnipeds and the effects of exposure to underwater and aerial noise. Much greater aerial sensitivity than previously documented in pinnipeds was demonstrated in individuals from three species. These data were obtained in a highly controlled acoustic testing environment and suggest that most, if not all, previous aerial pinniped audiograms were noise limited. Similar simultaneous (masking) and residual (auditory fatigue) effects of noise exposure were demonstrated in air and water. Noise exposure in the auditory fatigue experiments was systematically varied in both exposure level and exposure duration to investigate the relative importance of these noise parameters in causing temporary changes in hearing sensitivity. Age-related changes in hearing were also demonstrated and indicated most severe hearing losses at relatively high test frequencies. The combined results have a number of practical and theoretical implications and, most notably, indicate that pinniped cochlear processes are similar both in air and water to those occurring in terrestrial mammals.


Noise Impacts on Pinniped Hearing

Noise Impacts on Pinniped Hearing
Author:
Publisher:
Total Pages: 6
Release: 2006
Genre:
ISBN:

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The National Research Council, in a series of recent reports on marine mammals and anthropogenic noise, has identified the need to develop and test predictive models of acoustic conditions that would harm marine mammals. The primary aim of the current study was to assess the effects of intense, octave bands of noise on auditory sensitivity in three pinniped species. Specifically, temporary threshold shifts ranging up to 30 dB were induced in trained subjects in order to evaluate the relative effects of noise level and duration. Results showed that TTS onset occurred when noise levels exceeded hearing threshold by 80 dB for 12 minutes or more, irrespective of whether noise exposure occurred in air or under water. This corresponds to exposure levels of about 150-160 dB SEL in air and 183-207 dB SEL under water. Growth of TTS followed a modified exponential model rather than a simple equal energy trading model. Complementary field studies at harbor seal and northern elephant seal breeding areas characterized ambient noise environments and examined whether call features varied as a function of background noise levels.


Effects of Noise on Marine Mammals

Effects of Noise on Marine Mammals
Author: William John Richardson
Publisher:
Total Pages: 488
Release: 1991
Genre: Airplanes
ISBN:

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Effects of Anthropogenic Noise on Animals

Effects of Anthropogenic Noise on Animals
Author: Hans Slabbekoorn
Publisher: Springer
Total Pages: 322
Release: 2018-08-20
Genre: Medical
ISBN: 1493985744

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Over the past several years, many investigators interested in the effects of man-made sounds on animals have come to realize that there is much to gain from studying the broader literature on hearing sound and the effects of sound as well as data from the effects on humans. It has also become clear that knowledge of the effects of sound on one group of animals (e.g., birds or frogs) can guide studies on other groups (e.g., marine mammals or fishes) and that a review of all such studies together would be very useful to get a better understanding of the general principles and underlying cochlear and cognitive mechanisms that explain damage, disturbance, and deterrence across taxa. The purpose of this volume, then, is to provide a comprehensive review of the effects of man-made sounds on animals, with the goal of fulfilling two major needs. First, it was thought to be important to bring together data on sound and bioacoustics that have implications across all taxa (including humans) so that such information is generally available to the community of scholars interested in the effects of sound. This is done in Chaps. 2-5. Second, in Chaps. 6-10, the volume brings together what is known about the effects of sound on diverse vertebrate taxa so that investigators with interests in specific groups can learn from the data and experimental approaches from other species. Put another way, having an overview of the similarities and discrepancies among various animal groups and insight into the “how and why” will benefit the overall conceptual understanding, applications in society, and all future research.


Marine Mammals and Noise

Marine Mammals and Noise
Author: W. John Richardson
Publisher: Academic Press
Total Pages: 593
Release: 2013-10-22
Genre: Science
ISBN: 0080573037

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Many marine mammals communicate by emitting sounds that pass through water. Such sounds can be received across great distances and can influence the behavior of these undersea creatures. In the past few decades, the oceans have become increasingly noisy, as underwater sounds from propellers, sonars, and other human activities make it difficult for marine mammals to communicate. This book discusses, among many other topics, just how well marine mammals hear, how noisy the oceans have become, and what effects these new sounds have on marine mammals. The baseline of ambient noise, the sounds produced by machines and mammals, the sensitivity of marine mammal hearing, and the reactions of marine mammals are also examined. An essential addition to any marine biologist's library, Marine Mammals and Noise will be especially appealing to marine mammalogists, researchers, policy makers and regulators, and marine biologists and oceanographers using sound in their research.


Low-Frequency Sound and Marine Mammals

Low-Frequency Sound and Marine Mammals
Author: National Research Council
Publisher: National Academies Press
Total Pages: 91
Release: 1994-02-01
Genre: Science
ISBN: 0309050251

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This volume reviews the current state of knowledge regarding the effects of low-frequency sound on marine mammals and makes recommendations for research. In addition, the book describes current federal regulations prescribed under the Marine Mammal Protection Act that govern the taking of marine mammals by scientific research activities, and it recommends changes to expedite the regulatory process dealing with scientific research activities.


Biosonar

Biosonar
Author: Annemarie Surlykke
Publisher: Springer
Total Pages: 312
Release: 2014-07-19
Genre: Science
ISBN: 1461491460

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Two groups of animals, bats and odontocetes (toothed whales), have independently developed the ability to orient and detect prey by biosonar (echolocation). This active mechanism of orientation allows these animals to operate under low light conditions. Biosonar is a conceptual overview of what is known about biosonar in bats and odontocetes. Chapters are written by bat and odontocetes experts, resulting in collaborations that not only examine data on both animals, but also compare and contrast mechanisms. This book provides a unique insight that will help improve our understanding of biosonar in both animal groups.


The Effects of Noise on Aquatic Life II

The Effects of Noise on Aquatic Life II
Author: Arthur N. Popper
Publisher: Springer
Total Pages: 1243
Release: 2015-11-26
Genre: Medical
ISBN: 149392981X

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The meeting of Aquatic Noise 2013 will introduce participants to the most recent research data, regulatory issues and thinking about effects of man-made noise and will foster critical cross-disciplinary discussion between the participants. Emphasis will be on the cross-fertilization of ideas and findings across species and noise sources. As with its predecessor, The Effects of Noise on Aquatic Life: 3rd International Conference will encourage discussion of the impact of underwater sound, its regulation and mitigation of its effects. With over 100 contributions from leading researchers, a wide range of sources of underwater sound will be considered.


Marine Mammal Populations and Ocean Noise

Marine Mammal Populations and Ocean Noise
Author: National Research Council
Publisher: National Academies Press
Total Pages: 142
Release: 2005-01-24
Genre: Science
ISBN: 0309133491

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Attention has been drawn to the subject of how ocean noise affects marine mammals by a series of marine mammal strandings, lawsuits, and legislative hearings, and most recently, the report from the U.S. Commission on Ocean Policy. One way to assess the impact of ocean noise is to consider whether it causes changes in animal behavior that are "biologically significant," that is, those that affect an animal's ability to grow, survive, and reproduce. This report offers a conceptual model designed to clarify which marine mammal behaviors are biologically significant for conservation purposes. The report is intended to help scientists and policymakers interpret provisions of the federal Marine Mammal Protection Act.