What is Noise Induced Hearing Loss (NIHL) caused by?

• A. High levels of vibrations
• B. Exposure to high levels of noise
• C. Use of certain chemicals
• D. Exposure to extreme temperatures

Answer: (B)

Noise Induced Hearing Loss (NIHL) is specifically caused by exposure to high levels of noise. This condition occurs when the inner ear structures become damaged due to prolonged or excessive sound exposure, typically measured in decibels (dB). Sounds above 85 dB can be detrimental, especially when the exposure is continuous or repeated over time. The hair cells in the cochlea can suffer irreversible damage, leading to a decline in hearing ability.

Understanding NIHL also highlights the importance of protective measures, such as the use of earplugs or earmuffs in noisy environments, to prevent damage before it occurs. Other options, while they may involve risk to health in different ways, do not directly contribute to the kind of auditory damage characterized by NIHL.