Assessing perceived diffuseness in music venues
2017
The effect of diffusing elements on the variance of indoor acoustical quality is defined as “diffuseness,” and the perception of diffuse sounds is mainly affected by the absorption and diffusion coefficients of surface materials in performance spaces. To characterize sound-field diffuseness, the acoustic parameters of a room, along with impulse-based diffusivity indices are calculated from the binaural room impulse responses. Then, auditory experiments are carried out for using convolved sounds, by investigating the acoustical attributes defined for perceived diffuseness: density of reflection, smoothness of decay, smoothness of reflection, and isotropic directivity. Diffuseness normally reduces the bass ratio and increases the brilliance, thereby increasing the clarity but decreasing the sound strength. In addition, the installed diffusers objectively increase envelopment, intimacy, and diffusion perception. It is seen that the direct sound level supported by the amount of diffuse reflections are related...
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