The detectability and acceptability of time and frequency amplitude clipped speech
Arlene C. Neuman, Harry N. Levitt, Jayashree Toraskar · The Journal of the Acoustical Society of America · 1986
Thresholds of detectability and acceptability of unfiltered and filtered speech clipped in the time and frequency domain were obtained on normal hearing listeners. Speech signals were digitized and the clipping of the signal in the time or frequency domain was done through a digital master hearing aid. All subjects were able to detect very small amounts of clipping (less than 1%) in both the time and frequency domains. However, the intelligibility of the speech continued to be acceptable until approximately 25% of the signal was clipped. More clipping could be tolerated in the time domain than in the frequency domain. Prefiltering of the speech (high-frequency boost) allowed increased clipping in the time domain. [Research supported by NIH.]