Questions With Correct Answers
Necessary factors for sound localization - CORRECT ANSWER✔✔--
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distance of object
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- direction of object
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Sound localization is provided by: - CORRECT ANSWER✔✔-- monaural
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cues
- binaural cues
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Monaural cues (one ear) - CORRECT ANSWER✔✔-- distance based on
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loudness of object | |
- distance based on shift in frequency
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Directionally dependent symmetry - CORRECT ANSWER✔✔-
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overestimate change in sound from approaching object relative to
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receding object |
Doppler shift - CORRECT ANSWER✔✔-a change in the frequency (pitch)
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of a moving sound source relative to a stationary listener
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,Binaural cues (two ears) - CORRECT ANSWER✔✔-- interaural time
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difference
- interaural intensity (level) difference
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Interaural time difference - CORRECT ANSWER✔✔-the time difference
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produced when a sound reaches one ear before the other
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Where are the ITD detectors found? - CORRECT ANSWER✔✔-olivary
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nucleus
Precedence effect - CORRECT ANSWER✔✔-the perception of the sound
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reaching the ears from the farther of the two identical sound sources
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will be suppressed with regard to its localization
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Interaural intensity (level) difference - CORRECT ANSWER✔✔-the
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intensity difference produced when the sound reaching one ear is of a
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different intensity than the sound reaching the other ear
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Sound shadow - CORRECT ANSWER✔✔-an area of less intensity for
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sound waves that must travel across the head
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What happens when a sound source is located on the median plane? -
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CORRECT ANSWER✔✔-the sound is the same distance from each ear,
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and we need to move our head to accurately localize the object
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, Echolocation - CORRECT ANSWER✔✔-the use of self-produced echoes
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to gain location information
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Animals that utilize echolocation - CORRECT ANSWER✔✔-- small brown
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bat (tapping pulses)
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- silver-haired bat (timing pulse and changing frequency)
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- mexican free-tailed bat (higher pitch pulses)
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- british noctule bat (sounds like rap music)
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- dolphins, whales
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Two types of pulses in echolocation - CORRECT ANSWER✔✔-- constant
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frequency pulse (detecting targets, measuring Doppler Shift)
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- frequency modulated pulse (target distance)
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Echo delayed-tune neurons - CORRECT ANSWER✔✔-process the time
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interval between the emission of a tonal pulse by the bat and the return
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|of its echo after the pulse strikes the object
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Why do porpoise use echolocation? - CORRECT ANSWER✔✔-to slow
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down fish in order to help them eat
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