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Chapter 6

Chapter 6. Section 3: Hearing. What we hear. Stimulus for sound is a wave of pressure created when an object vibrates The vibration causes molecules in a transmitting substance (usually air) to move together & apart. Auditory Experience. Loudness: intensity of a pressure wave.

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Chapter 6

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  1. Chapter 6 Section 3: Hearing

  2. What we hear • Stimulus for sound is a wave of pressure created when an object vibrates • The vibration causes molecules in a transmitting substance (usually air) to move together & apart

  3. Auditory Experience • Loudness: intensity of a pressure wave. • Measured in decibels • Pitch: frequency of a pressure wave. • How rapidly the air vibrates

  4. Timbre: The distinguishing quality of sound • complexity of the pressure wave • When many frequencies are present but not in harmony, we hear noise • When many frequencies of the sound spectrum occur, they produce white noise

  5. An Ear on the world

  6. Soft funnel shaped outer ear is designed to collect sound waves • Sound wave passes through an inch long canal to strike the ear drum • Vibration is passed along to the hammer, anvil, & stirrup

  7. Actual organ of hearing is the organ of corti

  8. Constructing the auditory world • Use our perceptual powers to organize patterns of sound & to construct a meaningful auditory world • Need to know where sounds are coming from • Depend on having two ears • Hard to locate sounds coming from above or directly behind your head

  9. Name that sound • Sound 1 • Sound 2 • Sound 3 • Sound 4 • Sound 5 • Sound 6 • Sound 7 • Sound 8 • Sound 9 • Sound 10 • Applause • Crumbling • Cutting Paper with Scissors • Hair Mousse • Pad Lock Opening • Sea Lion • Cards Shuffling • Velcro • Bathtub filling up • Applying soap to hands

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