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PNB 2XB3 - Auditory System Questions and Answers | Latest Update 2024/2025 $9.99   Add to cart

Exam (elaborations)

PNB 2XB3 - Auditory System Questions and Answers | Latest Update 2024/2025

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Sound waves are ___; compression is __ of a wave, rarefaction is ___ ~~> longitudinal - move like a slinky; top; bottom Period ~~> the time taken for one up-down cycle (wavelength) Wavelength ~~> the distance b/w two peaks/an up-down cycle Universal wave equation ~~> speed = ...

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  • September 20, 2024
  • 11
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • PNB 2XB3
  • PNB 2XB3
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1 | P a g e | © copyright 2024/2025 | Grade A+


PNB 2XB3 - Auditory System Questions
and Answers | Latest Update
2024/2025
Sound waves are ___; compression is __ of a wave, rarefaction is ___

✓ ~~> longitudinal - move like a slinky; top; bottom



Period

✓ ~~> the time taken for one up-down cycle (wavelength)



Wavelength

✓ ~~> the distance b/w two peaks/an up-down cycle



Universal wave equation

✓ ~~> speed = distance/time = wavelength/period



Higher pitch =

✓ ~~> higher frequency - but perception depends on the environment



Sound frequency

✓ ~~> - longer wavelengths = lower frequency

- basilar membrane is like a xylophone in our ears



Adult human voice



Master01 | September, 2024/2025 | Latest update

, 2 | P a g e | © copyright 2024/2025 | Grade A+

✓ ~~> - has multiple tones - but there are dominant frequencies

- the avg male voice = 100 Hz (11 foot wavelength)

- the avg female voice = 200 Hz (6 foot frequency)



Sound localization

✓ ~~> - humans are very good at this; use 2 cues:

- the loudness (if its louder in the left ear, it is coming from the left); the time (if

it's coming from the right it arrives to the right ear first)

- neurons on either side compare these things



Ascending auditory pathway

✓ ~~> - cochlear nerve: where sound transduction happens

- 8th cranial nerve/auditory nerve: nerve goes up the brainstem and enters

the rostral medulla

- medulla has 2 nuceli: dorsal cochlear nucleus (has axons that decussate at

the medulla and go to the midbrain; midbrain axons go to the

auditory/medial geniculate thalamus); ventral cochlear nucleus (has axons

that go to the pons - next most rostral part of the brainstem)

- axons terminate bilaterally - affect both hemispheres (bilateral projections)



Auditory Cortex




Master01 | September, 2024/2025 | Latest update

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