Two groups (30 each) of subjects will be recruited to participate: Normal hearing adults and adults with mild to moderately severe hearing loss, ages 18-65. Pure tone audiometrics (re ANSI, 1996) will be done to ascertain the hearing sensitivity through 6ooo Hz. Normal hearing will be defined as thresholds at or better than 20 dB HL (re ANSI, 1996). The only exclusion criterion for the group exhibiting hearing loss is that no thresholds up to and including 3000 Hz will exceed 75 dB, so as to minimize the inclusion of subjects with "dead regions" in the cochlea.