Hearing Flashcards
Frequency
Number of complete wavelengths that pass a point in a given time
Audition
Sense or act of hearing
Pitch
Tones experience highness or lowness. Depends on frequency
The closer to the oval window the higher pitch it is
Middle ear
Chamber between the eardrum and the cochlea containing three bones.
Oval window causes fluid through the cochlea
Sound waves
Compression and expansion of air waves. Number of frequency equals the pitch of the waves
Ex: 20,000 high pitched
Slow wavy line bass note low pitched
Amplitude
Loudness. Due to size of wave
Three bones in the ear
Ossicles
Malleus- hammer
Incus- anvil
Stapes- stirrup
Tiniest bones in human body
Conduction deafness
Sound waves not transmitted effectively to cochlea. Bones are stiff and the sound isn’t amplified enough. Hearing aid can help
Sensorineural nerve deafness
Killed hair cells with loud music/old age. Damage to auditory nerve. Doesn’t grow back
Inner ear
Contains cochlea semicircular canals and vestibular sacs. Innermost part of the ear
Process
Sound waves enter outer ear-> channels waves through the auditor canal to the eardrum-> three tiny bones transmits them to the cochlea-> cochlea membrane vibrates-> causes ripples and bends hair cells-> triggers impulses in the nerve cells->auditory nerve sends messages through thalamus to brains temporal nerve