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Design, Generation and Analysis of Digital Test Signals

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Design and generation of test signals for measurement of electroacoustic systems, as well as for psychoacoustic testing is discussed. The main focus is on a digital generation of low-level harmonic test signals and an observation how subsequent DSP processing of those introduces a distortion. Mathematical analysis describes the origin of this distortion, and its audible perception is also examined. Further it is shown how the influence of various distorting components on audible perception can be minimized by using dither. Additionally, the generation of sweeping frequency signals and multitone signals is discussed.

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