Preferred Hearing Aid Response Characteristics Under Acoustic and Telecoil Coupling Conditions.

Telephone communication remains a major obstacle for hearing-impaired listeners. Even with the use of amplification, many hearing aid (HA) users report significant difficulty understanding telephone conversations. Although much effort has recently been focused on determining ideal HA performance for typical communication settings, less has been directed toward preferred HA responses during telephone coupling conditions. If one assumes that telecoil coupling strategies may require different HA performance characteristics because of line noise, filtering effects, coupling method, and output limitations imposed by the telephone system and receiver, then further study of listeners' preferred HA response characteristics under telecoil coupling conditions appears warranted.This study evaluated the preferred real ear aided response (REAR) for a group of hearing-impaired listeners under acoustic and telecoil conditions when coupled to a standard telephone receiver. Findings revealed that subjects preferred substantially more low-frequency gain than would be predicted using three popular prescriptive formulae. In general, a gradually rising to flat response was preferred by most of the hearing-impaired listeners. Implications for HA fitting and management will be discussed.

Central auditory processing in normal-hearing elderly adults.

Central auditory and linguistic functions were assessed in a group of 25 essentially normal-hearing, cognitively intact elderly adults. Inclusion in the study required normal performance on the Mini-Mental State Examination Procedures used to evaluate central auditory performance included monosyllabic word lists, the Synthetic Sentence Identification-Ipsilateral Competing Message (SSI-ICM) test, the Dichotic Digits test and the Staggered Spondaic Word test. Linguistic competence was assessed utilizing subtests of the Boston Diagnostic Aphasia test and the Revised Token test. Results indicate that central auditory involvement can occur without a concomitant decline in peripheral hearing sensitivity, cognitive function, or linguistic competence. Our findings also suggest, that for the type of individuals included in this study, the SSI-ICM appears to be the most sensitive measure to changes in central auditory processing abilities with advancing age.