Diversity in sound pressure levels and estimated active space of resident killer whale vocalizations

  title={Diversity in sound pressure levels and estimated active space of resident killer whale vocalizations},
  author={Patrick J. O. Miller},
  journal={Journal of Comparative Physiology A},
  • P. Miller
  • Published 11 January 2006
  • Physics
  • Journal of Comparative Physiology A
Signal source intensity and detection range, which integrates source intensity with propagation loss, background noise and receiver hearing abilities, are important characteristics of communication signals. Apparent source levels were calculated for 819 pulsed calls and 24 whistles produced by free-ranging resident killer whales by triangulating the angles-of-arrival of sounds on two beamforming arrays towed in series. Levels in the 1–20 kHz band ranged from 131 to 168 dB re 1 μPa at 1 m, with… 

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