Claim: Hearing loss may be triggered by constant exposure to excessive noise levels.
Evidence: Hearing loss may be caused by a number of factors , including : genetics , ageing , exposure to noise , some infections , birth complications , trauma to the ear , and certain medications or toxins.
Hearing may deteriorate gradually from chronic and repeated noise exposure , such as loud music or background noise , or suddenly , from a short high intensity noise such as a gunshot or airhorn.