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ITU-R BS.1170-2 and EBU R128 recommendations introduce a new paradigm for audio metering, which define a way to measure perceived loudness of audio material in a normalized and reproducible manner.

Please refer to the official documents freely available online at http://tech.ebu.ch/groups/ploud or consult a reference book such as “Audio Metering</link>. Measurements, standards and practice” by Eddy Brixen (Focal Press, ISBN 9780240814674) for detailed information on this subject.