Chapter 4 - Hearing! Flashcards
15 - 18
What’s the scientific word for hearing?
audition!
sound waves = hearing.
light waves = ______.
seeing!
amplitude of light = ______.
amplitude of sound = ______.
amplitude of light is brightness!
amplitude of sound is volume!
wavelength of light = ______.
frequency of sound = ______.
wavelength = color! frequency = pitch/tone!
What is the Pinna?
outer part of ear; like a satellite dish to capture and direct sound.
What is the Eardrum (tympanic membrane)?
middle part of ear; stretches across the inside end of the auditory canal.
What are the Ossicles?
three bones of the middle ear that amplify the vibration and cause the basilar membrane to vibrate.
info. 3 smallest bones of body!
What’s the cochlea?
long fluid-filled tube that is the organ of auditory transduction full of all the neurons.
info. is like the retina of the eye.
What are the hair cells like?
hair cells of ear are like rods/cones of eye.
What are the two main theories about the way the basilar membrane converts pressure waves to perceived sound?
Temporal code (frequency code)
&
Place code
define temporal code (frequency code):
rate of vibration of entire cochlea!
define place code:
specific places along length of cochlea respond to different tones more intensely.
What’s the difference between sensorineural hearing loss and conduction hearing loss?
sensorineural: inner ear, damage to cochlea.
conduction: middle/outer ear, generally acquired.
what is sound localization?
being able to know the direction of a sound.
what’s loudness?
sound coming from left will be louder from left ear than right ear.
