Hearing in the Environment

Hearing in the Environment - 10 10 Hearing in the...

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10 Hearing in the Environment Chapter 10 10 Hearing in the Environment • Sound Localization • Complex Sounds • Auditory Scene Analysis • Continuity and Restoration Effects 10 Sound Localization How do you locate a sound? – Cricket example. – Similar dilemma to determining how far an object is. – Two ears: Critical for determining auditory locations.
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10 Visual vs. Auditory Receptors 10 Sound Localization Interaural time difference (ITD): The difference in time between a sound arriving at one ear versus the other. 10 Different Inputs to the Two Ears
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10 Sound Localization Azimuth: Used to describe locations on imaginary circle that extends around us, in a horizontal plane – Can analyze ITD: Where would a sound source need to be located to produce maximum possible ITD? – What location would lead to minimum possible ITD? – What would happen at intermediate locations? 10 Interaural Time Differences (Part 1) 10 Interaural Time Differences (Part 2)
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10 Sound Localization Physiology of ITD – Medial superior olives (MSOs): First place where input converges from two ears. – ITD detectors form connections from inputs coming from two ears during first few months of life. 10 Auditory Information Pathway 10 Sound Localization Interaural level difference (ILD): The difference in level (intensity) between a sound arriving at one ear versus the other.
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10 Sound Localization Sounds are more intense at the ear closer to sound source.
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Hearing in the Environment - 10 10 Hearing in the...

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