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22 Cards in this Set

  • Front
  • Back

Responsibilities and Job Function

Evaluations for adults and children

Fitting hearing aids and FM devices

Cochlear Implant mapping

Neonatal Hearing screens

Hearing Loss prevention

Inter operative monitoring

balance testing and therapy

educational and university setting



Types of Hearing Loss

1.) Hearing sensitivity- a reduction in the sensitivity of the auditory mechanism so that sounds need to be louder than normal for listener to perceive.

2.) Auditory Nervous System Disorder- may or may not include hearing sensitivity loss, but often results in reduced ability to hear suprathreshold sounds properly.

3.) Functional Hearing Loss- exaggeration or fabrication of hearing loss

Threshold Vs. Suprathreshold

Threshold measures try to find the lowest level at which a person can hear/understand speech.

Suprathreshold seeks to determine how well a person understands what is heard, once it has been made audible.

Hearing Loss Types

1.) Conductive- outter and middle ear; bone conduction WNL, air-bone gap significant

2. Sensorineural- cochlear, retrocochlear; bone conduction loss, air-bone gap not significant

3.) Mixed- air conduction loss; bone conduction loss, air-bone gap significant

Deaf Vs. deaf

(Captial D) refers to a cultural group

(lowercase d) is defined by an audiogram

Types of hearing aids


Behind the ear

In the ear

In the canal

Completely in the canal

Parts of hearing Aids

All hearing aids have:


power source


Optional Parts:


tone control

ear mode

Cochlear Implants

The functional replacement of the ear



speech processor

external receiver

internal electrode array

Assistive listening devices

Sound enhancement technology:

hard wired systems

infrared systems

loop induction systems

FM systems


Telephone enhancement Systems

television enhancement systems

signal alerting devices

What allow things to vibrate?

Elasticity and Inertia

Normal frequency for humans to hear

20-20,000 Hz

Speech frequencies

125-8,000 Hz


display disproportionately low word recognition in comparison to pure tones, worst type of HL for word recognition, acoustic neuroma

Carhart's notch

dip in audiogram at 2000 Hz due to stapes fixation


faking a hearing loss

Speech recognition/reception threshold

part of speech audiometry, uses spondee words (equal stress, cowboy)


measures function of outer hair cells, absence of response suggests issues with the inner ear.


abnormal response implies auditory neuropathy (retrocochlear problem)

Acoustic reflex delay

reduced suggests retrocochlear problem, positive suggests possible acoustic tumor


graphical plot showing eardrum compliance at different values of air pressure

Tympanogram Types

A: normal

As: shallow compliance(otosclerosis, ear infection)

Ad: deep compliance (ossicular disarticulation)

C: negative pressure (eustacian tube dysfunction)

B: flat- no pressure or complaince

Degree of hearing loss

Normal -10-15- hears all speech sounds

Slight 16-25 - may miss some consonants

Mild 26-40 may miss some speech sounds

Mod 41-55 will miss most speech at normal level

Mod severe 56-70 will not hear any speech at normal

Severe 71-90 will not hear any speech and almost any other sounds

Profound 91+ will not hear any speech and probably only very loud sounds