Figure 6. Sketch of the setup with sound source and hydrophone to monitor source level for 2023, 2024 and 2025. The distance between the C-Bass and the icListen was 6.5 m in 2023. In 2024, the position of the hydrophone varied slightly, so that the distance for block 1-2 was 11.2 m, for block 3-4 11.04 m and for block 5-6 it was 11.28 m.
