SLHS 2203 Lecture Notes - Lecture 19: Earwax, Airbag, Barotrauma
10 Apr 2018
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Next model due 12-apr (we will start the model in class next tues). Our bodies alter the sounds that we hear. Sound is shaped/filtered by the body, leading to some sounds being amplified (gain added) and other being attenuated. A head related transfer function is a mathematical representation of the ways in which the positions of the head, trunk, and ears filter sounds. Based on the graph to the right: when sound is reaching the ear, from above, for what frequencies does the pinna/auricle, attenuate sounds: >2000 hz, >15000 hz, ~1000 hz, all frequencies. The external auditory meatus terminates at the tympanic membrane (tm) The tm is the boundary between the ear canal and the middle ear (me) The tympanic membrane is an oval, thin, semi-transparent membrane that separates the external and middle ear. It functions to transmit sound from the air into the small bones in the middle ear.
