PSYCH 1XX3 Lecture Notes - Lecture 6: Hindbrain, Sound Intensity, Retina
29 Mar 2018
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Auditory mechanisms of di erent species: auditory mechanisms vary across di erent species according to speci c needs. The dog whistle produces a sound at a high frequency that is beyond the range of human ears but well within the range of the dog"s auditory system. Sound frequency perception in vertebrates: humans can perceive sounds that lie anywhere between 20 and. The basilar membrane: the basilar membrane varies in length across species; it is shortest in amphibians and reptiles, longer in birds, and longest in mammals, a longer basilar membrane allows processing of a wider range of frequencies. And so, mammals can discriminate the widest range of frequencies while most other species cannot discriminate frequencies over 10000 hz. Responding to changes in air pressure: this chain reaction is much like the ripples you observe when you throw a stone into a pond.
