Asymmetry and dynamics of a narrow sonar beam in an echolocating harbor porpoise.

  title={Asymmetry and dynamics of a narrow sonar beam in an echolocating harbor porpoise.},
  author={Jens C. Koblitz and Magnus Wahlberg and Peter Stilz and Peter Teglberg Madsen and Kristian Beedholm and Hans-Ulrich Schnitzler},
  journal={The Journal of the Acoustical Society of America},
  volume={131 3},
A key component in the operation of a biosonar system is the radiation of sound energy from the sound producing head structures of toothed whales and microbats. The current view involves a fixed transmission aperture by which the beam width can only change via changes in the frequency of radiated clicks. To test that for a porpoise, echolocation clicks were recorded with high angular resolution using a 16 hydrophone array. The beam is narrower than previously reported (DI = 24 dB) and slightly… CONTINUE READING
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