First European Conference on Speech Communication and Technology

Paris, France
September 27-29, 1989

Effects of Spectral Smearing on Speech Reception

Mariken ter Keurs, Reinier Plomp, Joost M. Festen

Department of Otolaryngology, Free University Hospital, Amsterdam, The Netherlands

The effect of reduced frequency resolution on the Speech-Reception Threshold (SRT) for sentences in noise was investigated for eight, normal-hearing subjects. Signal processing was performed by short-time Fast Fourier Transforms (FFT) and overlapping additions to reconstruct a continuous signal. Spectral energy in the frequency region from 100 to 8000 Hz was smeared over fixed relative bandwidths of 1/8, 1/4, 1/2, 1, 2, 4, and 8 octaves. The order of conditions was varied according to a Latin-square design. Results show that the SRT increases progressively as the spectral energy is smeared over bandwidths exceeding the ear's critical bandwidth.

Full Paper

Bibliographic reference.  Keurs, Mariken ter / Plomp, Reinier / Festen, Joost M. (1989): "Effects of spectral smearing on speech reception", In EUROSPEECH-1989, 1251-1253.