PSYCH 1X03 Lecture Notes - Noise-Induced Hearing Loss, Stirrup, Frontal Lobe
11 Apr 2013
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Amplitude: measures loudness, lots of ampltides around main tone, even if take out the main tone, brain can still comprehend and understand the info behind the tone because of our previous experiences. Frequency: measures pitch, lowest sound we can hear is a buzzing musquitto about 2 m away. Couple of problems: the sound we are hearing may be very quite but we can still hear it!, cochlea is filled with fluid!!!! Running through water is hard so sound: resembes a contraption some ingenious plumber put together , ossicles are leverage system that amplify sound. Vibrations from tympanic membrane makes stirrup acts like a piston. Muscles (strapedius muscle) limits the amount to which stirrup can move (as sound gets louder, the muscles constrict and limit movement of stirrup) The reason our recorded voice sounds weird to us is because when we talk sound is conducted through our bones and so in recorded sounds we only have raw stimulus.
