Center for Hearing Research
Daniel Rasetshwane, PhD
Director, Auditory Signal Professing Lab
Boystown National Research Hospital 

Many people with hearing loss who could benefit from hearing aids choose not to use them because of limited benefit and poor sound quality.  Current fitting algorithms are limited because they use audiometric thresholds, instead of suprathreshold measures, and current signal-processing algorithms are limited because they ignore other cochlear processes that are diminished with hearing loss.  We have developed a fitting algorithm that utilizes categorical loudness scaling data and a signal-processing algorithm that restores suppression, and evaluation of both algorithms resulted in promising outcomes.  We believe that work from our lab will lead to improved quality in hearing aids and patient satisfaction with their use. 

keywords: hearing speech, noise, cochlea, and electrocochleography