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7.The customization consisted of removing unnecessary elements from the standard shift program, and adding components to mix in masking noise post-shift, as well as providing for monaural or binaural presentation. The actual pitch shift module was not altered.
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Effects of frequency-shifted feedback are typically examined using Eventide Harmonizer Series processors to shift the fundamental frequency () of auditory feedback during vocalizations, eliciting compensatory shifts in speaker . Recently, unexpected intensity changes were observed in speakers' ear canals, corresponding with shifts. An investigation revealed that feedback time delays introduced by the processor resulted in phase shifts between feedback and unprocessed voice signals radiating into the ear canal via bone conduction, producing combination waves with gains as high as 6 dB. Shifts of this magnitude potentially alter the interpretation of previously published results and should be controlled in future studies.


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