Abstract
Peak clipping is a common form of distortion in hearing aids and can reduce the subjective quality of the amplified speech. In a previous study involving listeners with normal hearing (Kates & Kozma-Spytek, 1994), the effect of peak clipping on speech quality ratings was studied using sentence test materials that were filtered using three different frequency response contours and then clipped at four different clipping levels. The present study extends the quality ratings to include those from a group of listeners having moderate to profound hearing impairments. The experimental results indicate that the clipping level, and the interaction of the frequency-response shaping with the clipping level, significantly affects speech quality. It is also shown that the distortion effects on speech quality for the listeners with impaired hearing can be modeled by a distortion index computed from the magnitude-squared coherence of the speech-processing system in response to a shaped-noise input signal. The distortion-index weights derived for the group of listeners with impaired hearing, however, differ substantially from those derived for listeners with normal hearing, and substantial inter-listener variation was also observed.
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Citations
May 19, 2005·The Journal of the Acoustical Society of America·James M Kates, Kathryn H Arehart
Aug 4, 2007·The Journal of the Acoustical Society of America·Kathryn H ArehartLewis O Harvey
Sep 18, 1999·The Journal of the Acoustical Society of America·N J VersfeldT Houtgast
Jun 30, 2000·The Journal of the Acoustical Society of America·J M Kates
Jan 28, 1999·The Journal of the Acoustical Society of America·P G StelmachowiczD H Keefe
Feb 16, 2011·International Journal of Audiology·Kathryn H ArehartMelinda C Anderson
May 10, 2008·International Journal of Audiology·Chin-Tuan Tan, Brian C J Moore
Nov 12, 2015·BioMed Research International·Zoe Yee Ting Chan, Bradley McPherson
Apr 11, 2000·Journal of Speech, Language, and Hearing Research : JSLHR·K T Boike, P E Souza
May 5, 2010·Ear and Hearing·Kathryn H ArehartMelinda C Anderson