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Figure 4


Fig. 4. On-axis and off-axis waveforms and spectra of buzz clicks. (A) Waveform of buzz click from an untagged whale judged to be on-axis. (B) Presumed off-axis buzz click from the same sequence (note the change in amplitude scale). (C) Spectra of the on-axis click (solid line), off-axis click (dot-dash line), an echo return from a tagged whale buzz click (broken line), and the noise floor (dotted line).





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