Figure 4. A snapshot, in time, of two complex numbers whose exponents, and thus their phase angles, change with time. The notion of negative frequency is often troubling to engineers who've spent so ...
Audio forensics is an increasingly critical field in modern investigative science, exploiting the unique characteristics of electrical network frequency (ENF) signatures embedded in digital recordings ...
Fig 1. Density addition and subtraction can easily separate these audio channels before digitalization. Fig 2. Density multiplication can easily be used to multiply these two inputs in several ...
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