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Fig. 3. Three versions of the same Grampus click X from Fig. 2 are displayed. (A) The presumed on-axis version of the click with a high apparent source level (ASL), short duration (left) and a smooth, broadband spectrum (right). (B) The same click recorded 5° off the recording aspect of A. The duration is longer, the ASL is lower, and the bandwidth and f0 are reduced compared to A. (C) The same click recorded in an aspect of 10° compared to A. The duration has increased, ASL, f0 and bandwidth have decreased compared to A and B, and a number of notches are seen in the spectrum.





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