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<p>This code can be used to generate acoustic stimulus of particular pass band for conducting tonotopy presented in our paper "The representation of time windows in primate auditory cortex" [1]</p> <p>To map the auditory subfields, information from tonotopy fMRI data, macro-anatomical features (cortical folding), anatomical MRI can be combined. So tonotopic information from each individual animal can be used in the parcellation of function-anatomical areas of the auditory cortex. For characterising tonotopy using the BOLD response to spectral frequencies sound stimuli were based on random-phase noise carrier with different pass-bands: 0.125-0.25 kHz, 0.25-0.5 kHz, 0.5-1 kHz, 1-2 kHz, 2-4 kHz, 4-8 kHz, and 8-16 kHz resulting in stimuli that encompassed different spectral ranges. The carriers were amplitude modulated with a sinusoidal envelope of 90% depth at 10 Hz to achieve a robust response in the auditory system.</p> <p>Here are the MATLAB scripts for generating random phase bandpass noise stimuli with optional amplitude modulation.</p> <p>If you use this source code then please cite this paper:</p> <p>[1] Pradeep Dheerendra, Simon Baumann, Olivier Joly, Fabien Balezeau, Sukhbinder Kumar, Christopher I Petkov, Alexander Thiele, Timothy D Griffiths, "The representation of time windows in primate auditory cortex", </p>
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