PSYC 101 Lecture Notes - Strabismus, Jigsaw Puzzle, Stereoblindness
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PSYC 101 Full Course Notes
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Document Summary
Auditory perception depends upon sound waves interacting with structures of the ear. Sound waves are changes over time in the pressure of an elastic medium (for example, air or water). Without air (or another elastic medium) there can be no sound waves, thus no sound. If a tree falls in the forest and no one is around to hear it it creates sound waves. Waves received by ears, transduced into neural signals. Without ears to hear it, the waves are just waves, not sound. Changes in air pressure are the sound signals. Number of peaks reaching the ear per second is the frequency. Difference between peak pressure and minimum pressure is the amplitude. Amplitude relates to the loudness we perceive - 20,000 hz = highest frequency humans can hear. 100-4000 hz = average useful range of the human voice. 27 hz = lowest note on a piano. Pitch: how high a note appears, associated with frequency.
