ECOL 485 Lecture Notes - Lecture 27: Lazzaro Spallanzani, Donald Griffin, Hertz
19 Oct 2018
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Able to discover that if bats ears and mouths were covered/plugged up they struggle. With contraction of flight muscles--- helps assist in lung ventilation--- allows for larengilial calls. So energetically costly that it"s best for the two to work together. Emission of high frequency sound pulses to help detect the area. Sound waves go out hit an object and come back to the bat at the same speed. Listen for returning echoes--- listen for minute differences in each ear- goes to each ear to locate the object. Sounds produced in the larix, emitted through nose or mouth and coordinated with wing flaps. Can"t breathe and echolocate at same time. Distance in waves-distance in which wavelength is shaped--- measured in meters. Determines if sound is reflected or refracted. High frequency sounds more suitable for objects that are close, produce echoes from smaller objects. Velocity= to wavelength of sound times frequency.
