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. 2015 Feb 11;9:38. doi: 10.3389/fnins.2015.00038

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Copyright © 2015 Han and Dimitrijevic.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Acoustic stimuli used. (A) For the AM change stimuli, 3 AM rates (4, 40, and 300 Hz) and 3 modulation depths were used. The time scale is one second. (B) An example of an acoustic sequence in the two conditions. The top row shows a ~6 s sample of 4 Hz 100% AM change, and a 40 Hz 100% AM change with the corresponding AM burst stimuli below. Note that in order to reduce possible loudness cues from no modulation to AM, the rms of the AM was equated with the 1 s preceding noise.