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Audiometry Reports

Audiometry Reports: Understanding and Interpreting Results

Audiometry reports, often presented as audiograms, provide a visual representation of an individual’s hearing ability across various frequencies. These reports are crucial for diagnosing and managing hearing loss. Below is a detailed explanation of how to interpret audiometry results.

Understanding Audiograms

1. Axes and Symbols:
   • X-axis: Represents frequency in Hertz (Hz), ranging from low pitches (125 Hz) to high pitches (8000 Hz).
   • Y-axis: Measures sound intensity in decibels (dB), from very quiet (-10 dB) to very loud (120 dB).
   • Symbols: Differentiate between ears and testing methods:
     • Air Conduction: O (right ear unmasked), X (left ear unmasked), △ (right ear masked), ▢ (left ear masked).
     • Bone Conduction: < (right ear unmasked), > (left ear unmasked), [ (right ear masked), ] (left ear masked).
2. Hearing Thresholds:
   • Indicate the softest sound an individual can hear at each frequency.
   • Normal hearing thresholds are typically between -10 dB and 25 dB.
3. Types of Hearing Loss:
   • Sensorineural Hearing Loss: Typically shows similar air and bone conduction thresholds.
   • Conductive Hearing Loss: Shows an air-bone gap (difference between air and bone conduction thresholds), often due to middle ear issues.
   • Mixed Hearing Loss: Combination of sensorineural and conductive components.

Interpreting Hearing Loss Levels

1. Normal Hearing: -10 dB to 25 dB.
2. Mild Hearing Loss: 26 dB to 40 dB.
3. Moderate Hearing Loss: 41 dB to 70 dB.
4. Severe Hearing Loss: 71 dB to 95 dB.
5. Profound Hearing Loss: Greater than 95 dB.

Clinical Use of Audiometry Reports

• Diagnosis: Helps identify the type and extent of hearing loss.
• Treatment Planning: Guides the selection of appropriate hearing aids or other interventions.
• Monitoring Progress: Useful for tracking changes in hearing over time.

Conclusion

Audiometry reports are essential tools for assessing hearing loss and guiding treatment decisions. Understanding how to read and interpret these reports enables healthcare professionals and individuals to make informed choices about hearing health.

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References

1. St George’s NHS: How to Read Your Hearing Test Results
2. Northside Audiology: Interpreting Test Results
3. Healthy Hearing: How to Read an Audiogram
4. Geeky Medics: Audiogram Interpretation
5. AAFP: Audiometry Screening and Interpretation
6. Healthline: How to Read an Audiogram
7. American Ear: How to Read Your Hearing Test Results
8. StatPearls: Audiogram Interpretation