Noise Damage Accelerates Auditory Aging and Tinnitus: A Canadian Population-Based Study

Area of Science:

• Audiology
• Environmental Health
• Gerontology

Background:

• Age-related hearing loss (ARHL) is a prevalent disability in older adults.
• Chronic noise exposure (CNE) is a modifiable risk factor for ARHL and associated adverse health effects.
• Limited large-scale studies have quantified the impact of CNE on ARHL progression and tinnitus.

Purpose of the Study:

• To investigate the impact of chronic noise exposure (CNE) on the progression of age-related hearing loss (ARHL).
• To assess the association between CNE and the prevalence and severity of tinnitus.
• To determine how CNE influences audiological outcomes in a large cohort.

Main Methods:

• Retrospective analysis of audiology clinical data from 928 individuals aged 30-100 years.
• Comparison of hearing assessments and tinnitus prevalence between individuals with and without documented CNE.
• Exclusion of participants with other known risk factors for hearing loss to isolate the effects of noise.

Main Results:

• CNE was associated with significantly greater ARHL per decade and accelerated onset of hearing impairment by approximately two decades.
• Individuals with CNE showed increased word recognition score loss and a more than threefold increase in constant tinnitus prevalence.
• Noise exposure also led to elevated static compliance of the tympanic membrane across all age groups.

Conclusions:

• Chronic noise exposure significantly contributes to auditory aging.
• CNE is a critical factor in the development and progression of both age-related hearing loss and tinnitus.
• Findings underscore the importance of noise reduction strategies for preserving hearing health in aging populations.