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Download Airborne vs. bone conduction
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Transcript
Airborne vs. bone conduction Conduction hearing loss Sensorineural hearing loss The three parts of the ear Sound frequency ≈ pitch Sound amplitude ≈ loudness Phase Middle ear ossicles Amplification due to surface area ~16 times Amplification due to lever action Total amplification =(sa reduction)*(lever) Total amplification =16*1.3 times Middle ear muscles reduce pressure tensor tympani: lower amplitude, higher f stapedius: lower amplitude The simplified (unrolled) cochlea Cochlear tonotopy Pressure waves and the cochlear duct Organ of Corti Outer and inner hair cells Outer hair cells move OHCs are the cochlear amplifier Hair cell and afferent neuron responses to sound Hearing depends on extensive central processing Speech production
