Which one of the following frequencies of tuning fork is preferred for bedside Rinne, Weber and Schwabach tests?
- A 128 Hz
- B 256 Hz
- C 512 Hz ✓
- D 2048 Hz
Correct answer: C. 512 Hz
Explanation
The 512 Hz fork is the standard because it produces sufficient vibratory energy with a reasonably long decay time while generating minimal tactile (vibration) sensation on the skin and mastoid. A 256 Hz fork is readily felt through touch, so the patient may report feeling rather than hearing the fork, giving spurious results. Forks of 2048 Hz decay too rapidly for reliable bedside timing and give little bone-conducted output.
Reference: Dhingra, Diseases of Ear, Nose and Throat, 8th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.