PSYB65H3 Chapter Notes - Chapter 8: Echolalia, Frontal Lobe, Oval Window

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8 Dec 2012
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The properties of sound: frequency: is the physical dimension. Humans can only hear between 20-20000 hz. Frequency is different from speed sounds travels at around 340 meters/second. The higher the frequency, the higher the pitch: amplitude: the physical dimension. Waves of different intensities differ in the degree to which the high point and the low point differ from each other. Conversational speech tends to occur at 40-60 db. The bigger the difference between the high and low parts of the wave, the: complexity: the physical dimension louder the sound. Most sounds are composed of a wide variety of frequencies and intensities (pitch and loudness) Along with the intended frequency (the fundamental frequency) an instrument usually produces overtone too (frequencies higher than but related to the fundamental frequency) Timbre: the perceptual dimension: sounds are changing at all times and both our ears hear different things but still all these information are effortlessly integrated into an unitary perception.

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