Abstract
The detectability of a masked, interrupted, band-limited (150-2,400 Hz) noise signal was studied as a function of whether the interruption process was periodic or random. A standard monaural two-interval, temporal forced-choice detection procedure was employed both with and without a low-level contralateral cue (MDCC). The cue was an independent noise interrupted synchronously with the signal. Detection performance was equal under all conditions and was equivalent to the detection of an uninterrupted noise signal of equal power. Furthermore, like speech waveforms, the two types of interruption processes were discriminable only at levels at least 10–12 dB above the level required for detection.
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This research was supported by Grant NS 03856 to Central Institute for the Deaf and Fellowship NS 45299 to the author, both from the National Institute of Neurological Diseases and Stroke. The author is indebted to D. Eldredge, D. Ronken. R. Sorkin, and C. Watson for their helpful criticisms in the preparation of this paper.
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Pastoret, R.E. Detection of periodically and randomly interrupted noise signals. Perception & Psychophysics 14, 581–584 (1973). https://doi.org/10.3758/BF03211201
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DOI: https://doi.org/10.3758/BF03211201