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Full-Text Articles in Medicine and Health Sciences
A Comparison Of Two Systems Used In The Electro-Acoustic Evaluation Of Hearing Aids, Sallie Ann Frye
A Comparison Of Two Systems Used In The Electro-Acoustic Evaluation Of Hearing Aids, Sallie Ann Frye
Dissertations and Theses
The purpose of this study is to compare the Fonix Type 5000 Hearing Aid Test Set to the B&K system by testing the same hearing aids with both systems in order to determine whether there are any important differences between the measurements obtained using the two systems. Frequency response has been chosen as the measure on which the comparisons will be made.
Intelligibility Of Speech Compared Through Two Limiter Compression Circuits, Lee M. Odell
Intelligibility Of Speech Compared Through Two Limiter Compression Circuits, Lee M. Odell
Dissertations and Theses
Hearing aid manufacturers commonly engineer automatic gain control (AGC) circuits which are aimed at reducing'sound tolerance problems and improving speech intelligibility among wearers. The most common type of AGC engineered is one utilizing a fast attack time. The present study was designed to evaluate the effects of both fast and slow attack times on the intelligibility of speech. Twenty-four normal hearing subjects listened to sixty pre-recorded sentences through two types of hearing aid circuits. Thirty sentences were modified by a fast attack AGC circuit, and thirty sentences were modified by a slow attack AGC. The subjects marked one of four …