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Biomedical subjects

J F Corso

Publications and source records attributed to J F Corso.

11 recordsLinked to original sources
PubMed1992

Support for Corso's hearing loss model. Relating aging and noise exposure.

A brief review is provided of the variable ratio model [Corso, Audiology 1980;19:221-232] for partitioning the effects of age and noise exposure in cases of occupational hearing loss. Data are presented from Rosenhall, Pedersen, and Svanborg [Ear Hear 1990;11:257-263] which support the variable-ratio model. Suggestions are offered for the application of the model in medico-legal cases of permanent hearing damage due to excessive noise exposure.

Acoustic Stimulation↗
PubMed1980

Age correction factor in noise-induced hearing loss: a quantitative model.

This paper considers the factors of presbyacusis and noise exposure in relation to permanent hearing loss and provides a quantitative model from which an age correction factor in occupational hearing loss may be derived. The rationale for a presbyacusis correction is provided in terms of physiological and audiometric data. The additivity hypothesis is considered and constraints on this approach are presented. A quantitative model for assessing the age component in occupational hearing loss is then derived from empirical functions. The model is based on the concept of a variable ratio for partitioning the effects of presbyacusis and noise exposure. Consideration is given to the application of the model in medico-legal cases of occupational hearing loss in which the degree of hearing impairment must be assessed.

Aging↗
PubMed1976

Auditory temporal summation in presbycusis and noise exposure.

Threshold-duration functions were obtained at 250, 1000, and 4999 Hz by Brief-Tone Békésy Audiometry. Results for an older group (51-57 yrs.) with no otological abnormalities showed the presence of depressed threshold-duration functions with a decreased constant of temporal summation when compared to a young normative group. The effect is frequency dependent and is most pronounced at 4000 Hz. The older group, divided into noise exposed and non-noise exposed subsamples, showed identical threshold-duration functions and resembled those for a young noise exposed group. Auditory temporal summation appears to be affected by the neuorphysiological disturbances of presbycusis and at least from 51 to 57 years is independent of noise exposure.

Aging↗
PubMedDate not supplied

Presbyacusis, hearing aids and aging.

This paper considers the factors of presbyacusis and age-related psychological changes in older adults in terms of their effects on the use or potential use of hearing aids as a means of improving aural communication. Data are presented on the prevalence of hearing impairment and the extent of hearing aid use in aging listeners. Four major classes of presbyacusis are described (sensory, neural, metabolic, and cochlear conduvtive) and a hearing aid prognosis is made for each type of disorder. It is shown that aging produces deficits in pure-tone thresholds, the speech reception threshold, and speech discrimination, but not all losses can be 'corrected' with a hearing aid. Binaural (stereophonic) devices are psychoacoustically superior to monaural devices; however, behavioral and personality changes in older patients often create problems of adaptation to the binaural aid. These changes may also affect the fitting of an aid and the patient's ability to learn to use it. Some practical suggestions are offered on the evaluation of hearing aids and it is emphasized that adequate orientation and counseling are typically required if hearing aid treatment is to be successful in presbyacusis.

Adaptation, Psychological↗