Echolocation signals of wild harbour porpoises, Phocoena phocoena

@article{Villadsgaard2007EcholocationSO,
  title={Echolocation signals of wild harbour porpoises, Phocoena phocoena},
  author={Anne Villadsgaard and Magnus Wahlberg and Jakob Tougaard},
  journal={Journal of Experimental Biology},
  year={2007},
  volume={210},
  pages={56 - 64}
}
SUMMARY Field recordings of harbour porpoises (Phocoena phocoena) were made in the inner Danish waters with a vertical array of three or four hydrophones. The back-calculated source level ranged from 178 to 205 dB re 1μ Pa pp @ 1 m with a mean source level of 191 dB re 1 μPa pp @ 1 m. The maximum source level was more than 30 dB above what has been measured from captive animals, while the spectral and temporal properties were comparable. Calculations based on the sonar equation indicate that… 
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