Investigation of the optimum acoustical conditions for speech using auralization
Keywords:Acoustic noise, Acoustic wave absorption, Computer simulation, Headphones, Reverberation, Signal to noise ratio, Virtual reality, Hearing losses, Modified rhyme test (MRT), Noise levels, Spatial relationship
AbstractAn experimental approach to identify the optimal reverberation time in an idealized room, and validate theoretical prediction was discussed. Subject groups for the study were normal-hearing and hard-of-hearing people with a mild to moderate sensori-neutral hearing loss. Hard-of-hearing people needed high signal-to-noise level difference rather than shorter reverberation time to achieve better speech intelligibility. The results show that the optimal reverberation times depends on the signal-to-noise level difference and the spatial relationship between the listener and the sound sources for both normal and hard-of-hearing subjects.
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