Frequency responses of hearing aids and their effects on the speech perception of eight hard-of-hearing subjects

This dissertation examines the relationship between frequency response and word-discrimination performance of hearing-impaired persons. Three questions are addressed: does the restoration of the normal field-to-eardrum transfer function improve word discrimination; is the restoration of the normal shape of the audibility curve (uniform hearing level at all frequencies) beneficial to hearing-impaired listeners; and can speech discrimination be improved by an extension of the present narrow-band response in hearing aids.

The effects of extracorporeal membrane oxygenation (ECMO) on auditory brainstem responses (ABR) in neonates

This paper presents a study of the effects of extracorporeal membrane oxygenation (ECMO) on the auditory brainstem response (ABR) of twenty-three neonates, and whether there was asymmetric ABRs in the neonates who had ECMO.

The effects of special lighting on the lipreading performance of profoundly deaf children

This paper is a review of a study to determine optimum lighting conditions to facilitate lipreading.

The effects of noise exposure on rock bands

This paper describes a study undertaken to study noise levels of rock music.

Synergistic effects of noise, kanamycin, and hyperoxia on ABR thresholds in CBA/J mice

Young CBA/J mice were exposed to noise, kanamycin, and/or hyperoxia by 30 days post-gestational age in order to determine if a synergistic effect exists on ABR thresholds.

Most comfortable listening levels of hearing impaired people: effects of everyday auditory and visual environments

This paper discusses a study to evaluate the changes that may occur in most comfortable listening levels when hearing aid users encounter a realistic auditory and visual environment.

The effects of noise exposure on nitric oxide synthase knockout mice

This paper studies the role of nitric oxide (NOS 1, NOS 2, and NOS 3 genes) in the mouse cochlea and in noise-induced hearing loss (NIHL). Mice genetically deficient of the NOS 2 and NOS 3 genes were protected from NIHL, indicating that one or both of these genes may be responsible for producing nitric oxide that damages the inner ear when exposed to harmful levels of noise.

Are there hazardous auditory effects of high-frequency turbines and ultrasonic dental scalers on dental professionals?

The purpose of this pilot study was to survey dentists in the St. Louis area to assess their subjective opinion of commonly used dental handpieces as well as history of noise exposure and use of hearing protection. Selected handpieces were then chosen to measure their output levels and determine if emissions are hazardous to the auditory system.

The effects of carboplatin on hearing sensitivity in children

This paper discusses a study to determine the effect of carboplatin on hearing sensitivity in children.

The effects of gravity on the development of otolith organs in the Japanese quail

This paper examines the detailed embryologic development of the otolith organs, part of the vestibular system responsible for balance, in Japanese quail. The data from this study will provide baseline data for comparison with experiments conducted by NASA during space flight.