CCS - Passive Acoustics 2018 - ST67387405 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\n2018-05-09 | 2018-11-11 | ST67149836 | 00 | 15\t | 4 | 48 | CCS_SF_01\n2018-05-09 | 2018-11-11 | ST67379211 | 00 | 15\t | 4 | 48 | CCS_SF_03\n2018-05-09 | 2018-11-11 | ST67387405 | 00 | 15\t | 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.

海洋仪器公司（Ocean Instruments）的SoundTrap（ST）300 STD是一款紧凑型自持式水下水听器（hydrophone），由外部电池组供电。该ST300水听器安装在底栖着陆器（benthic landers）顶部附近，配套电池组则紧邻水听器布设。本系统记录了CCS研究海域的长期水下环境噪声水平。

部署开始日期 | 部署结束日期 | 水听器序列号 | 计划录制起始时刻（分钟） | 录制周期（分钟） | 单次录制时长（分钟） | 采样率（kHz） | 着陆器名称
2018-05-09 | 2018-11-11 | ST67149836 | 00 | 15 | 4 | 48 | CCS_SF_01
2018-05-09 | 2018-11-11 | ST67379211 | 00 | 15 | 4 | 48 | CCS_SF_03
2018-05-09 | 2018-11-11 | ST67387405 | 00 | 15 | 4 | 48 | CCS_SF_02

SoundTrap水听器由厂商完成原厂校准。标准原厂校准基于活塞式声校准器校准（piston phone calibration），分别针对低、高增益模式在250 Hz频率下开展。厂商已将校准结果上传至官方网站（http://www.oceaninstruments.co.nz/），可通过搜索对应设备序列号获取（详见表1）。该端到端校准结果对应的声压级（Sound Pressure Level, SPL）单位为dB re 1 μPa，对应生成满量程信号（即峰峰值为2.0个单位）的归一化（±1.0）“wav”音频文件。

数据溯源：录制的原始数据文件以专有格式“sud”存储。可将这些“sud”文件解压，得到三类文件：用于存储环境噪声测量数据的波形音频（wav）文件、包含传感器元数据的可扩展标记语言（extensible markup language, XML）文件，以及用于后续分析的附属传感器数据逗号分隔值（comma-separated values, CSV）文件。