Noise induced hearing loss (NIHL) tends to show a notch at which frequency?

Noise-induced hearing loss (NIHL) often presents a characteristic "notch" in audiogram readings, most notably at the frequency of 4000 Hz. This phenomenon occurs due to the damaging effects of loud noises on the hair cells in the cochlea, where the frequency of 4000 Hz is particularly susceptible. The notch is typically recognized in individuals who have experienced prolonged exposure to high-decibel environments, such as music concerts or workplaces with loud machinery.

The significance of 4000 Hz lies in the fact that it is commonly used in various occupational settings, making it a prominent frequency for damage. As a result, many individuals with NIHL will demonstrate a dip or reduction in hearing sensitivity at this specific frequency when assessed through audiometric testing. Understanding this typical frequency notch is crucial for audiologists and health technicians, as it aids in identifying and diagnosing NIHL, allowing for timely interventions or preventative measures.