Speaker
Description
Acoustic features derived from binaural and spherical harmonic representations of a sound field can be used for objective analysis of sound field properties as well as for perceptual modeling. When a sound field with a particular spatial extent is considered, such as in multichannel loudspeaker reproduction, the position-dependent variation of sound field features may be used to define a sweet area where the reproduction is regarded as sufficiently similar to the loudspeaker setup's sweet spot. Because measuring spatially dense sound field feature maps requires considerable practical effort, reconstructing the spatial variation of sound field features from a reduced number of measurements is desirable. To explore the possibility of reconstructing spatial feature maps from spatially sparse measurements, sound field parameters were measured in a listening room using an automated rover carrying a dummy head or a spherical microphone array. Different strategies for spatial subsampling of the sound field feature maps obtained from the measurements are investigated to arrive at a minimal measurement setup required for the application of sweet area analysis in multichannel loudspeaker reproduction.