PSYCH 1XX3 Lecture Notes - Lecture 7: Oval Window, Rarefaction, Ossicles
Document Summary
Both vision and audition use sensory organs and sends signals to the brain. Compression and pulling apart (rarefaction) causes sound. Sound doesn"t really go anywhere, just displaces molecules in the air (need medium to transfer) Sound isn"t directed the way light is: while light doesn"t need a medium to transfer, moves out from a central point like a drop of water in a pond, guitar vs banjo. Frequency = pitch: db logarithmic system 10 db, sound doubles. Ossicles take vibrations from tympanic membrane and amplify them on your oval window. What if noises are too loud: why doesn"t my own voice sound really loud in my head, small muscles (stapedius muscle) in ear that prevent the ossicles from moving too much. Prevents amplification of extreme sounds: sound different in a recording vs real life. Still have ability to identify own voice in a recording. Violinists have hearing damage in your ear closest to the violin.
