A method that allows direct comparisons between pure-tone loudness-matching and intensity-discrimination data in normal and hearing impaired listeners is described. (Author)

The investigation explored effects of stimulus level on frequency discrimination of long- and short-duration pure tones by five subjects with normal hearing and seven with sensorineural hearing impairments. The performance of hearing impaired subjects was poorer than normal for 300-ms tones but not for 5-ms tones. (Author/DB)

Binaural loudness summation was measured using three different paradigms with 10 normally hearing and 20 bilaterally symmetrical high-frequency sensorineural hearing loss subjects. Binaural summation increased with presentation level using the loudness matching procedure, with values in the 6-10 dB range. Summation decreased with level using the…

Input-output (I/O) functions of hearing aids were measured in response to a 2000 Hz tone burst, having 0.5 ms rise/fall time and 10 ms duration. Findings indicated that the steady-state output limitation characteristics of hearing aids cannot be estimated from their onset responses. (Author/DB)

Forward-masked psychophysical tuning curves were obtained at multiple probe levels from 26 normal-hearing listeners and 24 ears of 21 hearing-impaired listeners with cochlear hearing loss. Results indicated that some cochlear hearing losses influence the sharp tuning capabilities usually associated with outer hair cell function. (Author/JDD)

Three hearing aid manufacturers provided custom full-shell in-the-ear hearing aids designed for maximum acoustic gain for each of three hearing-impaired adults. Full-on coupler gain curves were similar across all nine hearing aids, with individual differences producing substantial variance in insertion gain across hearing aids. (Author/DB)

The paper describes the unexpected finding of evoked otoacoustic emissions from one ear of a subject with severe-to-profound bilateral sensorineural hearing loss. It is suggested that the subject may have a group of surviving outer hair cells in some regions of the left cochlea with corresponding inner hair cell or neural damage. (Author/DB)

The application of the Articulation Index (AI) model to the fitting of linear amplification was evaluated for 12 subjects with sensorineural hearing loss. For all subjects, the relationship between percent-correct scores on a nonsense syllable test and AIs was monotonic, indicating that AI was effective for comparing conditions typical of those…