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Basic Principles of Sound The Audiometer Test Environment Patient’s Role Clinician’s Role Air Conduction Audiometry Bone Conduction Audiometry Audiogram.

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Presentation on theme: "Basic Principles of Sound The Audiometer Test Environment Patient’s Role Clinician’s Role Air Conduction Audiometry Bone Conduction Audiometry Audiogram."— Presentation transcript:

1 Basic Principles of Sound The Audiometer Test Environment Patient’s Role Clinician’s Role Air Conduction Audiometry Bone Conduction Audiometry Audiogram Interpretation Masking Pure Tone Audiometry

2 Sound Waves and Propagation of Sound Frequency (Hz) Resonance Intensity (The Decibel or dB) Basics of Sound

3 Generic Audiometer Audiometer

4 Clinical and Portable Audiometer Audiometer

5 Earphones Audiometer

6 Insert Earphone Audiometer

7 Bone Conduction Vibrator Audiometer

8 Computerized Audiometer Audiometer

9 Sound Treated Booth Test Environment

10 Circumaural Enclosures Test Environment

11 Quiet Room Test Environment

12 Hand Raising Signal Button Verbal Response False Positives and False Negatives Patient’s Role

13 Instructions Patient’s Position Placement of Earphones Test Procedures for Screening Test Procedures for Pure Tone Thresholds Clinician’s Role

14 Instructions What are they listening for How to respond Verify they understand instructions Clinician’s Role

15 Position of Client - Adults and Children Earphone Placement Clinician’s Role

16 Screening Test Procedures (adults) Instructions Test Frequencies Disposition of Failures Clinician’s Role

17 Pure Tone Threshold Procedures Self-test Place earphones on patient Test better ear first Order of test frequencies Test other ear Use ASHA protocol for threshold testing. Clinician’s Role

18 Pure Tone Average (PTA) Three tone average Two tone average Other methods Clinician’s Role

19 Degree of Hearing Loss based on PTA None Slight Mild Moderate Moderately Severe Severe Profound Clinician’s Role

20 Role of Bone Conduction Purpose Mastoid Placement Forehead Placement Clinician’s Role

21 Basic Audiogram Audiograms

22 Symbols Audiograms

23 Type Degree Configuration Audiograms

24 Type of Loss - Conductive Audiograms

25 Type of Loss - Sensorineural Audiograms

26 Type of Loss - Mixed Audiograms

27 Configuration of Loss - Flat Audiograms

28 Configuration of Loss - Sloping (falling) Audiograms

29 Configuration of Loss - Rising Audiograms

30 Configuration of Loss - Tent Audiograms

31 Configuration of Loss - Mid-frequency or Cookie-bite Audiograms

32 Cross Hearing and Interaural Attenutation Masking Defined Rules Types of Masking Noise Masking

33 Cross Hearing Interaural Attenuation Definition Variables transducers frequency individual variability Masking

34 Definition Introduction of noise in NTE for the purpose of eliminating cross-hearing. Masking

35 Rule Apply masking to NTE whenever the AC of the TE exceeds the BC for the NT cochlea by the amount of the minimum IA values. Minimum IA values Supraaural phones = 40 dB Insert phones = 70 dB Bone conduction = 0 dB Masking

36 Types of Masking Noise White Noise Narrow Band Noise Masking

37 Summary


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