Biology 3601A/B Lecture Notes - Lecture 11: Oval Window, Wave, Basilar Membrane

• School: Western University
• Department: Biology
• Course: Biology 3601A/B
• Professor: Brent Sinclair

Document Summary

Note: up until the sound wave moving to the cochlea, nothing is controversial. Frequency analysis in the cochlea: bekesy: individual who determined that different sound waves stop in different positions in the cochlea, which is how we differentiate frequency. This process is passive: energy from the outside enviro was transformed into mechanical motion, and then into sensory inputs the auditory system is not actively participating jut passively taking in external stimuli. Thomas gold stated that this process is impossible: a passi(cid:448)e syste(cid:373) (cid:449)ould(cid:374)"t allo(cid:449) for this pre(cid:272)ise a(cid:374)d accurate sensory ability. Sound in, sound out sound energy is moving in both directions sounds move things, moving things make sound. The cochlear amplifier: high sensitivity, high frequency selectivity. Not exclusively cochlear this active process occurs in many organisms without cochlea. Tree cricket ears: ears located in forelegs. Sensory organ: different auditory organ a little simpler than the cochlea.