Effect of Hearing Aid Technology Level and Individual Characteristics on Listener Outcome Measures

Abstract

Purpose The purpose of the study was to determine the effect of hearing aid technology level on listener outcome measures. In addition, we aimed to determine if individual characteristics such as noise acceptance and the demands of the listening environment impacted performance and preference. Method A repeated-measures, single-blinded research design was utilized. Twenty-four adults recruited by mail from The University of Tennessee Health Science Center Audiology Clinic participated in this experiment (15 men and nine women). Participants completed two 2-week trial periods using Unitron T Moxi Fit FLEX:TRIAL devices programmed as basic or premium technology levels. A data-logging feature, Log It All (LIA), quantified the demands of the listening environment. At the end of each trial, outcome measures were obtained using Pascoe's High-Frequency Word List, the Hearing in Noise Test, the Quick Speech-in-Noise Test, the Acceptable Noise Level (ANL), the Speech, Spatial and Qualities of Hearing short form, satisfaction ratings, and preference. Results Results for ANL, satisfaction in large groups, and LIA total coverage were significantly improved for the premium devices. Participants who preferred the premium devices received significant improvement with premium devices on the ANL and the speech in small group and speech in large group satisfaction ratings, whereas participants who preferred the basic devices did not receive significant improvement with premium devices on any outcome measure. Participants in more demanding listening environments received significant improvement with premium devices on the ANL, whereas participants in less demanding listening environments did not receive significant improvement with premium devices on any outcome measure. Conclusions Group data revealed similar outcomes between technology levels on most measures; however, noise acceptance and satisfaction for speech in a large group were significantly improved when using the premium devices. Individual characteristics such as noise acceptance and listening demands may be useful when comparing hearing aid technology levels for a given patient.