What is noise-induced hearing loss?
Noise-induced hearing loss is caused by exposure to excessive sound levels. It commonly occurs due to repeated noise exposure over a long period of time (many years) in the workplace or can arise recreationally from attendance at loud concerts or the use of loud power tools at home. A single event such as an explosion can cause noise‐induced hearing loss if the intensity is loud enough. (Refer to our Decibel Diagram, attached).
Sound pressure caused by noise destroys the delicate nerve cells in the inner ear that transmit sound messages to the brain. The nerve cells are replaced by scar tissue which does not respond to sound. The damage is painless but permanent. Hearing aids can be helpful but cannot restore normal hearing.