Normal Hearing Bilaterally
Weber in the midline with Rinne showing air conduction greater than bone conduction (AC > BC) indicates normal hearing in both ears. 1
Interpretation Algorithm
Weber Test (Midline)
- Normal finding: Sound heard at midline or "everywhere" 1
- This indicates either:
- Both ears have equal hearing sensitivity, OR
- Both ears have symmetric sensorineural hearing loss (SNHL)
- Abnormal lateralization would suggest:
- Conductive hearing loss (CHL) in the ear where sound lateralizes, OR
- SNHL in the opposite ear 1
Rinne Test (AC > BC)
- Normal finding: Air conduction louder than bone conduction 1
- This is the expected result in:
- Normal hearing ears
- Ears with SNHL (the middle ear conduction mechanism is intact)
- Abnormal finding (BC > AC) indicates:
- CHL in that ear 1
Combined Interpretation
When both tests are normal (Weber midline + bilateral Rinne AC > BC):
- Most likely: Normal hearing bilaterally
- Alternative: Symmetric bilateral SNHL (both ears equally affected)
To distinguish between these two scenarios, you need pure tone audiometry (PTA), which is the gold standard for determining hearing thresholds and severity 2.
Clinical Caveats
Important limitations to recognize:
- Tuning fork tests do not supplant formal audiometry - they provide preliminary information only 1
- Poor sensitivity for mild hearing loss: These tests perform poorly when air-bone gaps are 5-35 dB 3
- Particularly unreliable in children: Accuracy is poor in pediatric populations with otitis media with effusion 4
- Proper technique is critical: Strike the tuning fork on a protected elbow or knee, NOT on hard surfaces, to avoid non-harmonic frequencies 1
Next Steps
If clinical suspicion exists for hearing loss despite normal tuning fork tests, obtain formal audiometry including pure tone thresholds, speech audiometry, tympanometry, and acoustic reflex testing 2. This is essential because tuning fork tests can miss mild-to-moderate hearing loss that significantly impacts quality of life.