ANTA02H3 Lecture Notes - Galleria Mellonella, Mantis, Neuroanatomy
Document Summary
Donald griffen: bats produce ultrasound and detect echoes from these emitted ultrasonic pulses. Bats can produce frequency-modulated calls, much like fm radio. Frugivorous bat producing frequency modulated calls for food. Insectivorous bat producing frequency modulated calls increase in frequency and end with a terminal pulse characteristic of tracking moving targets. The terminal pulse may be a way of honing in on their target over a large field of view. Bat species size correlated to frequency of ultrasound pulses produced. Bats also produced sound through their leaf nose. Sonar beam width decreases as emitter (bat) size increases relative to wavelength. To achieve the optimal directionality, larger bats will need a lower frequency and smaller bats will need higher frequency. Bat emits sound sound echoes off perceived by bat"s auditory machinery. Perception and memory for particular sounds triggers motor response to fly towards potential food and water site.
