audition

Question 1

ears detect what for sound

Answer 1

pressure changes and parallel processing extracts essential features

Question 2

pitch

Answer 2

how high (more vibrations) or low (few vib.)

• determined by frequncy
• Hz

Question 3

amplitude

Answer 3

loudness

db

Question 4

timbre

Answer 4

distinctness of sound with same pitch

Question 5

outer ear parts

Answer 5

pinna
auditory canal
eardrum/tympanic membrane

Question 6

middle ear parts

Answer 6

3 ossicles line eardrum to oval window

• hammer/malleus
• anvil / incus
• stirrup/stapes

Question 7

inner ear parts

Answer 7

cochlea

hair cells

Question 8

cochlea

Answer 8

fluid filled coiled snail shapes, bony chamber
stirrup created vibrations on the oval window, which moves fluid in waves
waves reach thousands of receptor in basilar membrane

Question 9

locating sounds

Answer 9

sound waves strike one ear sooner and more intensely than the other
from this info the brain computes the sounds location

Question 10

cochlea does what with sound info

Answer 10

cochlea transducers info via auditory nerve, to auditory cortex in the temporal lobe

Question 11

conduction deafness

Answer 11

• middle ear deafness; mechnanical issue

usually caused by disease. hearing aid/surgery to help

Question 12

sensorineural hearing loss

Answer 12

• inner ear or auditory nerve damage. birth defect, disease, aging
• almost always irreversible
• excessing noise; tinnitus