Abstract
Due to brain's internal wiring, a beating effect will be created in it as soon as two sine waves with slightly different frequencies be applied to each ear. Brain's response to such beat remains controversial; therefore and in addition to author's desire toward investigate the role of beat and carrier frequencies upon the brain, this research introduces a new way for quantifying such phenomenon by using an objective methods of quality assessment. In such method, the criteria of error visibility (differences) between tones had been tested. Gamma wave had been used here to investigate its beat and carrier frequencies effects inside the brain. The reversal relationship between (carrier-beat) frequencies activates uponStructural Similarity Index Metric (SSIM) andStructural Dissimilarity Metric (DSSIM) values. After all and in order to detect the best series in Gamma brain waves to investigate and quantize, carrier frequency produces a meaningful variation than beat frequency one.
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