Speech intelligibility in many social situations is affected by background noise and room reverberation. The effects of these factors are strongly influenced by the spatial configuration of the target and interfering sound sources and of the surrounding reflective surfaces with respect to the listener’s head.
As a result, intelligibility is largely decoupled from overall noise level and reverberation time and will vary markedly across different listeners in the same room and at the same time. We have developed a model of spatial release from masking that accurately predicts speech reception thresholds for any room and any spatial distribution of continuous masking noises.
An evolution of this model can also predict the effect of modulated masking noises. Such models have wide potential application in predicting the acoustic quality of a room, the best place to locate oneself in a noisy room, the optimal head orientation to adopt and the benefit of different kinds of auditory prosthesis.
Prof John Culling is an expert in psychocoustics, binaural hearing and speech perception in noise and he works in the School of Psychology at Cardiff University.
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