Presbycusis is a gradual sensorineural hearing loss associated with aging. The onset and the degree of hearing loss can vary considerably and is related to genetics, other impacts such as an accumulation of diseases, medications, and the cumulative effect of noise in the modern environment. Presbycusis and noise induced hearing loss appear to be additive and both can contribute to hearing loss in older people. Both types of hearing loss affect the upper range of an audiogram. A sloping audiogram with tapering to the lowest levels at 8,000 Hz often indicates that the hearing loss is aged-related, but after years of exposure, noise-induced hearing loss can have the same pattern. As humans begin losing their hearing, they often first lose the ability to detect quiet sounds in the high frequency range. This progresses to difficulty understanding conversations in noisy environments, even when amplified by hearing aids.
General guideline 1: The cost of a dual-ear, full-disability claim across the United States reported in The Noise Manual (Berger et al., 2003) averages approximately $66,000 in 2011 dollars (assuming a long-term average of 4.2% inflation)
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