[Temporal resolving capacity of the auditory analyzer of the dolphin Tursiops truncatus]

Differential threshold of discrimination of paired stimuli in relation to interimpulse interval has been investigated in man and porpoise. Similar features in mechanisms of discrimination of paired impulses in man and porpoise are noted. It was shown that threshold-interimpulse interval surve may be divided into several parts: two zones in which discrimination is made by different characters, and single transitional zone from one character to another.