Abstract
A sample of wideband noise 0.05, 0.1, 0.2, or 0.4 s in duration was digitized and then played cyclically to produce a repeated‐noise masker. The signal was a tone burst (0.4 or 1.6 kHz) and it was half the duration of the noise sample. The signal was centered in the noise temporally and was repeated at the same point in each repetition of the noise. In the antiphasic conditions of the experiment, either the noise sample or the signal was inverted in alternate repetitions of the masker; in the homphasic conditions both signal and noise, or neither, were inverted in alternate repetitions. If the auditory system were capable of making a high resolution record of these signals, alternate repetitions could be added or subtracted and, by analogy with the BMLD, we could expect a release from masking in the antiphasic conditions—a release that would be larger for the lower signal frequency. The results show a small but highly significant advantage for the antiphasic conditions with the 0.4‐kHz signal, and no difference at 1.6 kHz. However, in total, the data suggest a low‐resolution memory and a different mechanism than that which underlies the BMLD.
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