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. 2018 Mar 13;6(1):coy014. doi: 10.1093/conphys/coy014

Figure 2:

Figure 2:

Sound exposure levels (SELs) are the cumulative sound energy at 400–1200 Hz (the estimated hearing range of Amblyglyphidodon curacao embryo) over 4 min. The SELs are shown in sound pressure (left) and particle acceleration (right) for each of three sound treatments: a 2-stroke powered boat, a 4-stroke powered boat noise, and natural ambient conditions. Total SELs as well as the SELs above the estimated hearing thresholds of A. curacao embryos (110 dB sound pressure; 100 dB particle acceleration) were calculated. Analyses were conducted using paPAM on three 4 min tracks for each treatment. The mean SEL of each treatment is represented in the graph. For boat tracks, each of the three recordings used in computing the average SEL were from different boats to account for variability between boats with the same engine type.