Coral Larvae Move toward Reef Sounds
Figure 3
The experimental underwater sound field.
Analysis of RMS power gradients on all three axes of the experimental set-up (seeFigure 1) during playback showed a 4.4 dB gradient within the chamber. Recordings were taken at three locations along the apparatus. The gradient in the measurements is near to a cylindrical model of geometric spreading (RL = SL – 10 log (R/Rref)), as expected for shallow water environments, except that instead of a geometric model parameter of 10, the measured value was 11.1 (SEM = 1.4).