Julio César Hechavarria Cueria
Echolocating bats crucially depend on a precise cortical computation of echo-delay to be able to localize their prey. There are two strategies known how this task could be solved. Heteroharmonic bats compute the time interval between the emission of a lower frequency harmonic in the call and the incoming echoes from a higher frequency harmonic. This type of echo-delay tuning is found in CF-FM bats, whose echolocation signal consists of a constant frequency (CF) component followed by a frequency-modulated (FM) component. (ii) In contrast, bats emitting purely frequency modulated calls (FM bats) so far are described as computing the echo delays by using call-echo pairs of similar frequencies (homoharmonic).
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Druckversion: 02. März 2012, 16:19