I didn't know that! Issue# 14- Pitch perception

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Above: A overview of the production of voice and how our ear distinguishes a voice 

High frequency sounds selectively vibrate the basilar membrane of the inner ear near the entrance port (the oval window). Lower frequencies travel further along the membrane before causing appreciable excitation of the membrane. The basic pitch determining mechanism is based on the location along the membrane where the hair cells are stimulated.

Test your pitch perception! Click the link below