Efficacy of 3 Commonly Used Hearing Aid Circuits<SUBTITLE>A Crossover Trial</SUBTITLE>

Abstract

Each circuit provided significant benefit in quiet and noisy listening situations. The CL and WDRC circuits appeared to provide superior benefits compared with the PC, although the differences between them were much less than the differences between the aided vs unaided conditions. JAMA. 2000;284:1806-1813.

Impact of Advanced Hearing Aid Technology on Speech Understanding for Older Listeners with Mild to Moderate, Adult-Onset, Sensorineural Hearing Loss

“…Our results reinforce other published clinical trials in showing that hearing aids are beneficial [28], and that they improve quality of life [29] for older adults with hearing loss. Additional validation is derived from the categories that were distilled from positive and negative statements about hearing aid functioning in daily life.…”

Speech and Music Quality Ratings for Linear and Nonlinear Hearing Aid Circuitry

“…Speech quality ratings were similar for 50 and 65 dB SPL. The preference for WDRC at high speech levels was consistent with previous reports (Jenstad et al, 2000;Kam and Wong, 1999;Larson et al, 2000;Lunner et al, 1998;Souza et al, 2002). For speech in noise, listeners rated the +10 SNR higher than +6 SNR, but ratings were equivalent for PC, CL, and WDRC.…”

Implications of High-Frequency Cochlear Dead Regions for Fitting Hearing Aids to Adults With Mild to Moderately Severe Hearing Loss

“…Directional microphone and noise reduction features were present in the hearing aids but disabled for the study. All these hearing aid settings were consistent with current best practice evidence (Bentler, 2005; Davies-Venn, Souza, Brennan, & Stecker, 2009; Larson, et al, 2000). Half of the subjects were fit with the NAL program in the hearing aid’s Program 1 (P1).…”