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The water tank experimental setup The schematic diagram of the bubble generation system.

The top view of acoustic sources (S1- S4),  hydrophones (CH1-CH7), and vertical and horizontal hydrophone arrays (V-A1, V-A2, V-A3, H-A4, and H-A5)

3D view of acoustic sources, hydrophones, and hydrophone arrays from the bottom to the top

The schematic program for instrument control and data acquisition

Photo for constant flow bubbles  The signal for constant flow bubbles in time and frequency domains

Photo for a few bubbles  The signal for a few bubbles in time and frequency domains 

Swimming pool test