Measurements of ambient ocean noise in the frequency range 0.02–20 Hz were made with three current-screened hydrophones bottomed off Eleuthera Island, at depths of 13, 300, and 1200 m, respectively, over a period of about six weeks in June, July, and August. The results are compared with reported results of other experimenters and with results of some published theories of infrasonic noise generation in the ocean. Comparisons with published experimental data in the frequency range from 0.1 to 20 Hz show reasonable agreement. There do not appear to be published data in the region below 0.1 Hz for comparison. Comparisons with results of theories do not allow conclusive identification of generating mechanisms, but it appears that nonlinear interaction of surface waves and/or ocean turbulence are likely candidates in the frequency range 0.1–10 Hz. Below 0.1 Hz, no mechanism is postulated to account for the steep rise in noise level with decreasing frequency observed in the Eleuthera data. [Work supported by ONR.]