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. 2012 Oct 12;3:396. doi: 10.3389/fpsyg.2012.00396

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Copyright © 2012 Jaunmahomed and Chait.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.

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Examples of the auditory stimuli. Top: transition between a regular and random frequency pattern (REG-RAND). Bottom: transition between a random to regular frequency pattern (RAND-REG). The nominal transition, and lower bound estimate of detection time (for RAND-REG; derived in the DETECT block) are indicated with dashed lines. The plots represent “auditory” spectrograms, generated with a filterbank of 1/ERB wide channels (Equivalent Rectangular Bandwidth; Moore and Glasberg, 1983) equally spaced on a scale of ERB-rate. Channels are smoothed to obtain a temporal resolution similar to the Equivalent Rectangular Duration (Plack and Moore, 1990).