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  • Title: Speech intelligibility in virtual restaurants.
    Author: Culling JF.
    Journal: J Acoust Soc Am; 2016 Oct; 140(4):2418. PubMed ID: 27794329.
    Abstract:
    Speech reception thresholds (SRTs) for a target voice on the same virtual table were measured in various restaurant simulations under conditions of masking by between one and eight interferers at other tables. Results for different levels of reverberation and different simulation techniques were qualitatively similar. SRTs increased steeply with the number of interferers, reflecting progressive failure to perceptually unmask the target speech as the acoustic scene became more complex. For a single interferer, continuous noise was the most effective masker, and a single interfering voice of either gender was least effective. With two interferers, evidence of informational masking emerged as a difference in SRT between forward and reversed speech, but SRTs for all interferer types progressively converged at four and eight interferers. In simulation based on a real room, this occurred at a signal-to-noise ratio of around -5 dB.
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