Using a higher-order spherical microphone array to assess spatial and temporal distribution of sound in rooms

We have developed a spherical microphone called the Eigenmike® microphone array that is capable of achieving up to third-order spherical harmonics decomposition of the sound field. One potential use of the spherical array is to investigate the spatial nature of sound fields in rooms. In this talk, we will show some measurement results where the processed data from an Eigenmike® array is used to compute various energy ratios between the direct, lateral, rear, and floor and ceiling directions. We will also show some other simple measures that might be useful in the spatial analysis and characterization of room acoustics.