1. Audiograms Degree, Type and Configuration
Lecture 3

3. Degree of HL – Normal
Normal Hearing
Average Speech Level

4. Degree of HL – Mild Loss
Average Speech Level

5. Degree of HL – Moderate
Average Speech Level l

6. Degree of HL–Moderately Severe
Average Speech Level

7. Degree of HL - Severe
Normal Hearing
Average Speech Level l

8. Audiogram - Profound
Normal Hearing
Average Speech Level

9. Degree of HL– Mild to Moderate
Average Speech Level

10. Degree of HL–Moderate to Severe
Average Speech Level

11. Degree of HL
Average Speech Level

12. Example Audio – AC for LE and RE
Degree of HL for RE and LE?

13. Example Audio
Degree of HL for RE and LE

14. Type of Hearing Loss
Mixed HL
Conductive HL
Sensorineural HL

15. Describing HL: TYPES Conductive Sensorineural Mixed
HL resulting from damage to the inner hair cells or hearing nerve
Usually permanent
Results in attenuation AND distortion of sound
HL resulting from disorder of the outer and/or middle ear which interferes with transmission of the sound
Usually treatable
Results in attenuation of sound
Mixed

16. Conductive Hearing Loss

17. Diagnosing Conductive Hearing Loss
AC responses are _________________
BC responses __________________
The difference between the air to bone conduction responses is > than 10 dB HL
(Air Bone Gap)

18. Sensorineural Hearing Loss

19. Diagnosing Sensorineural Hearing Loss
AC responses are _________________
BC responses are _______________
When compare AC and BC pure-tone thresholds, BC responses should be similar to AC
BC < or equal 10 dB of AC responses

20. Mixed Hearing Loss

21. Diagnosing Mixed Hearing Loss
Reduction in_______ responses
Reduction in _______ responses
An AC to BC difference is present
Degree of HL ranges from mild to severe in degree
Tympanometry responses typically abnormal
Otoscopy can be abnormal or normal

22. Example Audios (separate audiograms)
Degree of HL for LE and RE
Type of HL for LE and RE

23. Example Audio
Estimate degree and type of HL for RE and LE

24. What type of HL?

25. Configuration Shape of HL as reflected by AC thresholds
Gives an overall pattern and additional clue about underlying etiology
Eg. Most HL in older adults, hearing is mostly worse in the High freq than the low freq
Most persons with OM have low freq HL

26. Configuration Descriptions used Flat Rising (Low Freq)
Sloping (High Freq)
Precipitous
Notch
Corner
Cookie Bite, Saucer
Symmetry
Unilateral
Bilateral

27. Unilateral vs bilateral vs symmetrical

28. Configuration

29. Explaining Audiograms
Provide privacy for explanation
Refer to graph
Low to high frequencies
soft to loud intensity
Review normal range
Review results for each ear
Degree of HL
Type of HL
Configuration of HL

30. Count the Dots Audiogram
Quantifies what is audible
Used to predict speech understanding
Emphasize the importance of a particular frequency relative to the contribution of understanding speech
Count the number of dots below the hearing levels plotted on audiogram
Bottom Line: Some frequencies
more important than others for
speech recognition

31. Count the Dot Audiogram to calculate how much of speech is audible (aka Articulation Index) (Mueller and Killion, 1990)

32. Updated Count the Dots

33. Self Assessment Questions
Can I describe an audiogram form?
Can I identify where speech sounds fall in relation to an audiogram?
Consonants, vowels,
key speech cues for low, mid and high frequencies
Can I interpret an audiogram for degree, type and configuration?
Can I plot an audiogram given the description of degree, type and configuration?
Can I calculate an AI on a count the dot audiogram?

34. 1 minute evaluation What can you apply when you leave this room?
What was the most important thing you remember learning today? What one question would you like reviewed related to what was discussed ?
What can you apply when you leave this room?