This isn’t as relevant to bubbles but a transducer phased array is what is used in multi-beam echosounders[1], which provide a swath of depth readings perpendic

This isn’t as relevant to bubbles but a transducer phased array is what is used in multi-beam echosounders[1], which provide a swath of depth readings perpendicular to the ship’s path. [1] https://en.m.wikipedia.org/wiki/Multibeam_echosounder https://en.m.wikipedia.org/wiki/Multibeam_echosounder