Auditory fatigue is seen at ?
**Core Concept**
Auditory fatigue, also known as temporary threshold shift (TTS), is a reversible decrease in hearing sensitivity that occurs after exposure to loud sounds. This phenomenon is a result of the damage to the hair cells in the cochlea, which are responsible for converting sound vibrations into electrical signals.
**Why the Correct Answer is Right**
The correct answer is related to the concept of temporary threshold shift (TTS), which occurs when the hair cells in the cochlea are subjected to loud sounds. The damage to the hair cells leads to a temporary decrease in hearing sensitivity, making it more difficult to detect sounds that were previously audible. The recovery of hearing sensitivity is typically within 16 to 48 hours after the removal of the loud sound stimulus.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect, as auditory fatigue is not typically seen at this frequency range.
**Option B:** Incorrect, as auditory fatigue is not typically seen at this sound pressure level.
**Option C:** Incorrect, as auditory fatigue is not typically seen at this duration of sound exposure.
**Clinical Pearl / High-Yield Fact**
It's essential to note that prolonged exposure to loud sounds can lead to permanent threshold shift (PTS), a condition characterized by permanent damage to the hair cells in the cochlea, resulting in a permanent decrease in hearing sensitivity.
**Correct Answer: C. 48 hours**