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User Evaluation on Loudness Harmonization on the Web

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The problem of annoying loudness jumps occurring between different TV and radio stations or programs became generally known over the last decades. Since the publication of the recommendations ITU-R BS.1770-1 (in 2006) and EBU-R 128 (in 2010) and the actual version of the ITU Recommendation BS.1770-2 (2011), more and more tools have become available that allow loudness harmonisation in broadcasting. The European research project NoTube integrates loudness harmonisation in its research concepts in order to investigate the applicability of these tools in web environments where the situation is even worse. The user evaluation of different loudness and loudness range adaptations presented in this paper was carried out online and thus considers real web conditions. In particular the interdependence between parameters of the listening environment and the loudness/loudness range adaptations are highlighted based on the results of nearly 100 participants.

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