Chapter 4 Section 3 Flashcards Preview

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Flashcards in Chapter 4 Section 3 Deck (13):
1

properties of south waves

frequency/wavelength is pitch, amplitude is loudness/intensity

2

decibel

unit of relative loudness of sound wave. 60dB is 1000x as loud as 30dB

3

pinna

external and visible part of ear, funnels sound waves to eardrum

4

tympanic membrane

eardrum, vibrates with the waves

5

cochlea

a snail-shaped liquid-filled tube in the inner ear. liquid moving moves hair cells, which trigger

6

oval window

the membrane covering the opening of the cochlea. vibrates, disturbing cochlea fluid.

7

cilia

16,000 hair cells all have bundle of fibers at tip. sensitive to one atom

8

frequency theory of hearing

whatever the pitch of a sound wave, nerve impulses of a corresponding frequency will be sent to the auditory nerve. For example, 600hz sound=600 nerve impulses per second.

9

place theory of hearing

different areas of the cochlea respond to different frequencies

10

conductive hearing loss

caused by physical damage to the ear that reduce ability to transfer vibrations

11

sensorineural hearing loss

caused by damage to cilia or the auditory nerve (less common but occurs with age)

12

tinnitus

a ringing or buzzing sensation

13

cochlear implant

series of electrodes placed inside the cochlea