Sound waves are produced when an impact or vibration

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Sound waves are produced when an impact or vibration causes a sudden change in air pressure. Light waves vary in: Length (wavelength)- which determines frequency (hue or color) Height (amplitude)- are produced when impact or vibration causes a sudden change in air pressure The eye captures light and focuses it on receptor on the retina where it is converted to neural signals. Small abnormalities in the eyeball’s shape cause problems with vision such as nearsightedness and farsightedness How we see: Receptors for vision (rods and cones) are located in the retina Ch. 4 Sensation and Perception 1/15/09 12:18 PM
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The fovea, a pit filled with cones is responsible for our sharpest vision The blind spot, near the fovea has no visual receptors. How we hear: sound waves Length (wavelength)- which determines pitch (highness or lowness) Height (amplitude)- which determines loudness (intensity of the sound) Complexity (range)- which determines timbre Structures of the outer and middle ear gather and focus sound waves, conducting them to cochlea o Receptors for hearing are hair cells in the cochlea Loudness of a sound is measured in decibels Chronic exposure to loud noise can cause permanent nerve deafness , as can diseases and biological changes associated with aging
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  • Fall '09
  • Marsee
  • Psychology, raw sensory data, unimportant sensory messages, converts particular sensory, color perception results

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