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Listening Efficiency Testing

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The same intelligibility of words can be realized under very different combinations of reverberation and signal to noise ratio. Unfortunately the current metrics do not account for the effort paid by the listener in order to achieve a given speech intelligibility. Recently this issue was tackled by introducing the “response time” as a psychophysical measure of this effort: its ratio with word intelligibility was named “listening efficiency”. In the work this concept is reviewed and applied to a conference hall under several acoustical conditions. A novel wireless system for listening tests is employed to collect the intelligibility and listening efficiency data. Statistical analysis shows how listening efficiency is able to resolve some ambiguities of the former metrics.

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