CCS - Passive Acoustics 2020 data

The Ocean Instruments SoundTrap (ST) 300 STD is a compact self-contained underwater hydrophone that was powered by an external battery pack. The ST300 hydrophone was mounted near the top of the benthic landers, and a battery pack mounted in close proximity to the hydrophone. The system recorded long-term underwater ambient noise levels of the CCS study site.\n\nDeployment start date | Deployment end date | Hydrophone serial number | Scheduled recording start (minute) | Period of recording (minute) | Duration of each recording (minute)\tSample rate (kHz) | Lander name\n2019-11-19 | 2020-04-13 | ST67387405 | 00 | 15 | 4 | 48 | CCS_SF_02\n\nThe SoundTrap hydrophones were factory calibrated by the manufacturer. The standard factory calibration was based on piston phone calibration performed for both low and high gain settings at 250 Hz. The calibration results were made available online by the manufacturer (http://www.oceaninstruments.co.nz/), and obtained by searching for the serial number (Table 1). These end-to-end calibration results represent the Sound Pressure Level (SPL) (dB re 1 μPa) that will result in a normalized (±1.0) ‘wav’ file with a full-scale signal (i.e. 2.0 units peak to peak).\nLineage: Recorded data files were stored as proprietary format ‘sud’ files. These ‘sud’ files can be decompressed to create waveform audio (wav) files containing ambient noise measurements, extensible markup language (xml) files containing sensor metadata, and comma-separated values (csv) files containing ancillary sensor data for later analyses.