Earl Johnson

Todd Ricketts2
Jeremy Federman1
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Despite high profile discussions of user-centered design in the CHI community, until recently a substantial population of users has been largely ignored. Users who have restricted or no use of hands, eyes, ears, or voice due to environment, task context, repetitive strain injury, or disability constitute a diverse and significant user population, but these(More)
This study examined the effects of extending high-frequency bandwidth, for both a speech signal and a background noise, on the acceptable signal-to-noise ratio (SNR) of listeners with mild sensorineural hearing loss through utilization of the Acceptable Noise Level (ANL) procedure. In addition to extending high-frequency bandwidth, the effects of(More)
BACKGROUND New and improved methods of feedback suppression are routinely introduced in hearing aids; however, comparisons of additional gain before feedback (AGBF) values across instruments are complicated by potential variability across subjects and measurement methods. PURPOSE To examine the variability in AGBF values across individual listeners and an(More)
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