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The duration of a sound is a relevant parameter in listener-focused acoustic modeling, noise mitigation, and environmental impact assessments related to a diverse set of anthropogenic sources. Auditory data for odontocetes which describe how hearing thresholds change with sound duration are scarce. Here, those data are synthesized and compared to masked behavioral hearing thresholds as a function of tone duration in bottlenose dolphins (Tursiops truncatus) and killer whales (Orcinus orca). The results indicate that background noise levels and frequency should also be considered when using signal duration as a parameter in acoustic impact assessments.

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Effect of Sound Duration and Masking Noise on Behavioral Hearing Thresholds in Killer Whales and Bottlenose Dolphins

  • 动态工具书词条

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Alyssa W. Accomando,
  • Jared Stephens,
  • Austin O’Kelley,
  • Kayla Nease,
  • Jason Mulsow,
  • Brian K. Branstetter,
  • Todd R. Robeck,
  • James J. Finneran

摘要

The duration of a sound is a relevant parameter in listener-focused acoustic modeling, noise mitigation, and environmental impact assessments related to a diverse set of anthropogenic sources. Auditory data for odontocetes which describe how hearing thresholds change with sound duration are scarce. Here, those data are synthesized and compared to masked behavioral hearing thresholds as a function of tone duration in bottlenose dolphins (Tursiops truncatus) and killer whales (Orcinus orca). The results indicate that background noise levels and frequency should also be considered when using signal duration as a parameter in acoustic impact assessments.