Speech distortion measures for hearing aids. J Rehabil Res Dev 1987;24(4):277-82
Date
01/01/1987Pubmed ID
3430386Scopus ID
2-s2.0-0023422687 (requires institutional sign-in at Scopus site) 4 CitationsAbstract
Advances in digital technology and the associated introduction of new forms of distortion led us to investigate supplementary measures of electroacoustic distortion for hearing aids. Mathematical techniques were used to formulate a working model in which the hearing aid acts as a time varying linear filter. This model embodies an approach to separating distortion into perceptually relevant and irrelevant categories. Digitized speech was converted to analog form, routed through a commercial hearing aid, and the output of the aid was redigitized and stored. For a given input signal, output speech waveforms were then compared to the model output and performance measures were derived. Distortion was plotted in three dimensions to permit interpretation with respect to time, frequency, and amplitude. These results provide a more comprehensive and general format for the analysis of hearing aid distortion.
Author List
Williamson MJ, Cummins KL, Hecox KEMESH terms used to index this publication - Major topics in bold
AcousticsDeafness
Hearing Aids
Humans
Microcomputers
Pitch Perception
Signal Processing, Computer-Assisted
Software
Speech Perception
