Psychology 2115A/B Lecture Notes - Lecture 6: Basilar Membrane, White Noise, 1000 Fires

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Has motion that reflects a traveling wave. Reaches a peak and then will die off. Low frequency"s travel farther down the membrane and there peaks are not as sharp. This allows us to hear because it moves the organ of corti. We hear the sounds that are most important to us. Threshold of frequency intensity required for identification. Contours are the same as the threshold. The frequency"s we don"t like, we don"t hear well. The ones that we do like, we do hear well. For the curve, they are just adjusting the loudness. Stevens power law works the exponent is around . 60. Baby can hear pitch extremely well 20 hertz-22000 hertz: you lose this over time. Helmholtz said each pitch you perceive is on a different spot on the basilar membrane. Von bekesy: created a model of how the basilar membrane might work.

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