Correlation-Tracking with the Hydra Array

摘要

Hydrophone arrays are widely used for tracking sources in and on the ocean such as whales, autonomous vehicles, and ships. The most common approach uses planewave beamforming in which the individual channels are combined with the appropriate delay for a presumed bearing angle. Sweeping through different bearing angles then provides a measure of the sound level in each listening direction and therefore the bearing of sound source(s). As acoustic models have become much more rapid and reliable it has become increasingly obvious that more sophisticated features of the received energy can be exploited to provide the source location in 3-space rather than just in bearing space. Here we describe the application of a correlation-based approach for a sparse, 6-phone, horizontal line array.