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Multichannel Loudness Listening Test
As part of ongoing research for ITU Recommendation BS.1770 Algorithms to measure audio programme loudness and true-peak audio level, listening tests were conducted using a standard five-channel geometry in a standard listening room to confirm the channel gains and the spectral weightings for equal loudness contribution. Most ITU-related work to date has used broadcast program as a test signal. In this test, octave band noise was used as a test signal. Twenty-seven listeners participated. Results were analysed for statistical consistency as well as for average and variance. Agreement between the test results and various broadband loudness models, including ITU-R BS.1770, is examined.
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