First International Conference on Spoken Language Processing (ICSLP 90)
Speech localization is simulated using the head-related transfer functions (HRTF) in order to clarify the binaural effects on speech intelligibility under the condition of noise disturbance. The HRTF filter coefficients are specifically calculated for the subject's own head and ears. The frequency response of the headphone is compensated for using an inverse filter calculated from the response at the subject's own ear canal entrance point. The phoneme articulation score under disturbance of noise is improved when the simulated distance in localization between the phoneme and noise is increased even though the total signal to noise ratio is maintained constant. This result shows the binaural effect in speech intelligibility under the noise disturbance, which is regarded as a part of the well-known cocktail party effect.
Bibliographic reference. Hayashi, Shinji (1990): "Improvements in binaural articulation score by simulated localization using head-related transfer functions", In ICSLP-1990, 977-980.