Week7

Question 1

Effect of Conductive Loss

Answer 1

Loss of audibility

Question 2

Effect of Sensorineural Loss

Answer 2

-Loss of audibility
-Loss of clarity

Question 3

Pure-Tone Audiometry Information

Answer 3

-Detection of Important frequencies
-Degree
-Type
-Configuration

Question 4

Speech Audiometry Information

Answer 4

-Stimuli to characterize patient’s ability to hear spoken language

Question 5

Recorded Materials Advantage

Answer 5

-Standardized talker speed
-Standardized talker vocal effort
-Standardized talker dialect/accent

Question 6

Monitored Live Voice Advantage

Answer 6

-More flexibility in presentation of materials
-Faster presentation
-Engaging with younger children

Question 7

Hierarchy of auditory skills and their Components

Answer 7

Lowest to highest:
-Detection: Determine presence/absence
->Discrimination: Distinguish between two or more sounds
->Recognition: Identify/Label
->Understanding: Comprehend the meaning

Question 8

Speech Detection Threshold (SDT) Definition

Answer 8

lowest intensity level (dB HL) that pt can detect speech.

Question 9

SDT Stimuli

Answer 9

Words, or continuous speech

Question 10

Why we use SDT

Answer 10

If pt cannot repeat back words

Question 11

Speech Recognition Threshold (SRT) Definition

Answer 11

Lowest intensity level (dB HL) that pt can correctly repeat words

Question 12

SRT Stimuli

Answer 12

Spondees (two-syllable words with equal stress)

Question 13

Why we use SRT

Answer 13

When pt can repeat back words

Question 14

SRT/PTA Relationship

Answer 14

SRT & PTA within +/- 10 dB, if not poor reliability.

Question 15

SDT/Lowest threshold Relationship

Answer 15

SDT within +/- 10 of lowest threshold of 250 to 4000 Hz

Question 16

Word Recognition Testing Definition

Answer 16

Assesses pt’s ability to correctly identify spoken words presented above threshold

Question 17

Word recognition Testing Stimuli

Answer 17

Monosyllabic Words

Question 18

Word Recognition Testing Presentation Level

Answer 18

40 dB sensation level (dB SL) (add 40 to SRT)

Question 19

WRT Score categories

Answer 19

90-100% = excellent,
80-89% = good,
70-79%=Fair,
60-69%=poor,
<60% = very poor

Question 20

Expected performance-intensity function for normal vs. conductive vs. sensory vs. neural/retrocochlear loss

Answer 20

-normal=100% correct around 40 dB above SRT. -Conductive= reaches 100% correct around 40 dB above SRT, but at a higher intensity than normal hearing.
-Sensory (cochlear)= does not reach 100% even at high intensity levels.
-Neural (retrocochlear)= as intensity increases, performance reaches a point where it starts to decrease.

Question 21

Signal-to-noise ratio: How to compute if given a signal and noise level

Answer 21

Speech – Noise= S-to-N ratio in dB

Question 22

Cross-Hearing Definition

Answer 22

Sound presented to one ear can reach the opposite cochlea via bone conduction

Question 23

interaural attenuation

Answer 23

The decibel reduction in sound intensity that reaches the opposite cochlea

Question 24

Values of interaural attenuation

Answer 24

-Insert earphones = 50 dB, -supra-aural headphones = 40 dB,
-bone oscillator = 0 dB

Question 25

For a given intensity level and a given transducer, determine the intensity level that reaches the opposite cochlea

Answer 25

intensity level of tone minus interaural attenuation = tone reaching opposite cochlea

Question 26

What happens if we fail to mask for air conduction and for bone conduction

Answer 26

We will underestimate the threshold.

Question 27

symbols for masked air conduction and masked bone conduction thresholds

Answer 27

Right masked air conduction= triangle (tone in right ear, masking noise in left), left masked air conduction = Square (tone in left ear, masking noise in right ear), Right masked bone conduction = square bracket eating the bar to the right (oscillator on right mastoid, masking tone via air conduction in left), Left masked bone conduction = square bracket eating the bar to the left (bone oscillator on left mastoid, masking tone in right ear)

Question 28

determine the degree of hearing loss based on masked thresholds

Answer 28

use masked thresholds for degree if present!

Question 29

determine if masking is needed for air-conduction and for bone conduction

Answer 29

air=if difference between air conduction threshold in test ear and bone conduction threshold in opposite ear is greater than or equal to interaural attenuation. Bone=when ac threshold and unmasked bc threshold in same ear is greater than or equal to 15 dB