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Audition

Audition. Mechanics . Amplitude: intensity (loudness) Pitch: tone (high pitch vs. low pitch) Timbre: quality of sound. Hearing. Auditory Canal Tympanic membrane Malleus, Incus, Stapes Oval Window Cochlea. Theories of Hearing. Place Theory (Helmholtz)

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Audition

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  1. Audition

  2. Mechanics • Amplitude: intensity (loudness) • Pitch: tone (high pitch vs. low pitch) • Timbre: quality of sound

  3. Hearing • Auditory Canal • Tympanic membrane • Malleus, Incus, Stapes • Oval Window • Cochlea

  4. Theories of Hearing • Place Theory (Helmholtz) • Pitch is determined by what part of the basilar membrane is stimulated • Frequency Theory • Basilar membrane fires the same frequency as sound • (volley principle--explains how higher frequencies are produced) • Duplicity Theory • Sounds are heard by combination of place and frequency

  5. http://science.kqed.org/quest/video/science-of-taste/

  6. Taste • Chemical Sense • Papillae on tongue are specialized for different chemicals • Now 5 • Salt • Sour • Bitter • Sweet • Umami

  7. Olfaction Stinks! • Chemical Sense • Direct path to brain • Olfactory epithelium has specialized receptors; take chemical energy from odors and converts to electrochemical

  8. Skin Sense • Haptic--pressure, temperature, pain • Pressure--shallow and deep • Temperature--warm and cold fibers • Pain

  9. Kinesthesis Body sense Tells us where our parts are Skeletal

  10. Vestibular • Vestibular sacs and semicircular canals hold fluid • Motion moves hairs in fluid • Acts like gyroscope

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