Abstract
The purpose of this investigation was to determine the extent to which listener ratings of the intelligibility of tracheoesophageal puncture (TEP) speech vary as a function of different signal-to-noise ratios. Fifty college students, 25 men and 25 women (Median age = 19.7 years) participated in the study. They were instructed to assign numbers to audio-recorded speech samples in each of nine signal-to-noise ratio conditions (+65 dB, +20 dB, +15 dB, +10 dB, +5 dB, 0 dB, −5 dB, −10 dB, and −15 dB) in two separate magnitude estimation scaling tasks. During Task 1 the subjects rated the intelligibility of a TEP speech sample. In Task 2 the subjects rated the intelligibility of a normal speech sample. The results indicated that as the levels of background noise increased, listener ratings of intelligibility decreased ( F 8,392 = 37.84; p ⩽ .0001).
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