This record represents the one-third octave band sound pressure levels (TOLs) derived from raw passive acoustic data. TOLs were calculated by integration of sound pressure spectral density estimates of the mean-square pressure with a 1 Hz/1 second resolution over 33 one-third octave bands with the nominal center frequencies ranging from 13 to 20,000 Hz. The result is then calculated per hour as a median over no less than 1,800 1-second values for that hour and converted to decibels (dB re 1 µPa).These data were recorded at SanctSound Site SB01_01 between November 12, 2018 and January 28, 2019.