HP & T (Help please & something with T)

When testing for pure tones we are testing

Behavioral responses to a set of stimulus

What do the results of a hearing tell us about an individual

Little to nothing outside of how the loss affects the person

Pure Tone Averages

Average of thresholds at 500, 1000 & 2000 AC

Why do we use PTA and the problems in using it.

it tells us nothing above the threshold of 2000 and its compensatory.

What is threshold for both pure tones and speech

should be the same (the worsening hearing loss may affect this 1:1 ratio)

Conductive HL

Occurs within the Outer and Middle Ear

Sensorineural HL

Occurs within the Inner Ear

Differences between Bone and Air Conduction

Bone Conduction reaches the inner ear directly by the bone of the skull.

Air conduction reaches the inner ear through the outer and middle ear.

Speech Reception Threshold

Threshold for 2 syllable spondaic words

Speech Detection Threshold

Threshold for the detection of speech

Dynamic Range

Difference b/t Threshold & Uncomfortable Loudness Level

Word discrimination testing

percentage understanding of single syllable words

Importance of speech testing

helps determine the impact of hearing loss

Inter aural attenuation for an air conducted signal and bone conducted

40 dB

Signal Cross Hearing

When there is a significant difference between the ears either AC or BC

Difference between behavioral and objective tests

Human response vs. response obtained w/o human response.

Otoacoustic Emissions

outer hair cells of the cochlea declining in function OAE. Tells us if the outer hair cells are functioning but not the degree of HL or type. Typically used for SCREENING and looking over status of the cochlea.

Spontaneous & Evoked

Spontanious - occurs at random

Evoked - looking for a response in

Auditory evoked potentials

difference between before there is sound and after (cochlear function). Measuring what occurs 10msecs after the introduction of the auditory signal.

The DPOAE results can be used to guesstimate behavioral auditory thresholds 

False

 Cross hearing takes place via

Bone Conduction

A sensorineural hearing impairment results from disorders in the middle ear system, cochlea, eight nerve of cochlear nuclei. The loss is generally reversible.

False (permanent)

What type of hearing loss is associated with otitis media. 

conductive HL

One drawback in using DPOAEs (Distortion Product Otoacoustic Emissions) for infant screenings is that they are affected by neuromaturation.

False

The Pure tone average (PTA) is the average of

500, 1000, & 2000

 Distortion Product Otoacoustic Emissions are echoes that are generated by the inner hair cells of the cochlea

False (Outer)

Air conduction testing is the most important portion of the audiometric test battery because not only does it provide information as to the degree but also the type of hearing loss.

False (needs both air and bone to fully understand)

 There is a strong correlation between the Speech Reception Threshold and the…

Pure Tone Average

When absent spontaneous otoacoustic emissions are evidence of a retrocochlear issue.

False (not everybody has spontaneous otoacoustic emissions, and it is a cochlear issue)

When present, Distortion product otoacoustic emissions indicates normal middle ear function

True

Theoretically bone conduction thresholds should never be worse than air conduction thresholds.

True (Bone should be the best recording cause it goes straight to the inner ear)

Disorders of the outer ear and middle ear always results in a sensorineural hearing loss

False

Disorders of the outer and middle ear can NEVER result in a sensorineural hearing loss

False (sometimes)