PSYB51H3 Chapter 9: Chapter 9
Document Summary
modest amount of energy on one side of fulcrum (joint) becomes larger on other. lever action increases amount of pressure change by about a third: concentrating energy from larger to smaller surface area. tympanic membrane, which moves malleus about 18 times as large as oval window, which moved by stapes. pressure on oval window magnified 18 times relative to pressure on tympanic membrane. Inner ear made up of fluid-filled chambers: middle ear has 2 muscles, tensor tympani: attached to malleus, stapedius: attached to stapes. Inner ear: fine changes in sound pressure available in environment translated into neural signals that inform listener about world, translates information carried by waves into neural signals. 3 canals of cochlea separated by 2 membranes: reissner"s membrane: between vestibular canal and middle canal, basilar membrane: between middle canal and tympanic canal, basilar membrane forms base of cochlear partition: complex structure through which sound waves.
