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Audio forensics based on fluctuations in the electrical network frequency (ENF) has become one of the major approaches for the authentication of digital audio recordings. Yet little is known about the circumstances and preconditions under which battery-powered devices leave ENF artifacts in their recordings. Our study with multiple mobile recording devices confirms the hypothesis that background noise,...
An audio recording is subject to a number of possible distortions and artifacts. Consider, for example, artifacts due to acoustic reverberation and background noise. The acoustic reverberation depends on the shape and the composition of the room, and it causes temporal and spectral smearing of the recorded sound. The background noise, on the other hand, depends on the secondary audio source activities...
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