Purposeful Changes in the Structure of Echolocation Pulses in Tursiops Truncatus
In echolocation of obstacles and fish, dolphins normally rely on stereotyped pulses (Romanenko, 1974; Belkovitch and Dubrovsky, 1976). These pulses consist of 1–1.5 waves and their shape and frequency spectra are resistant to environmental changes. Even a considerable increase in the noise level in the ambient environment by means of sources distant from the dolphin causes no noticeable changes in pulse shape and frequency spectra.
KeywordsPulse Shape Noise Source Noise Generator Main Pulse External Auditory Meatus
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