We have the results of several simulations of different array geometries, sizes, and frequencies of interest. In all cases, they are attempting to image a scene with a single source at a specific frequency. Plots are 4 separate images of the same scene, at different frequencies, but keeping all other parameters the same. The frequency for each image is the number at the top of it.
Randomly distributed microphones, showing slightly reduced artifacts, but at the cost of a higher, random noise floor over most of the image
Image form microphones randomly distributed through a volume, showing nearly identical performance to the random array
8*12 rectangular array images, showing better noise performance over most of the image than the random distribution, but with distinct, clearly visible artifacts.
Early, low-resolution simulation, showing that the concept is at least viable at these sizes/frequencies.
The 10KHz image in this series shows one of the issues with higher frequencies, an artifact is visible at the left of the image, while the source is slightly off center to the right. This artifact stays out of the field of view that we’re interested in (90 degrees), but will have to be considered in the final design.