Passive acoustic recordings made in Fowlers Bay, South Australia, during the austral winter of 2013–2017 revealed the presence of several sources of underwater sound. Sound sources of biological origin include baleen and toothed whales, fish and shrimp. Physical sources of underwater sound include wind- and rain-driven noises, and underwater sounds of anthropogenic origin were primarily from boats and occasionally from an aircraft. Biological sound sources were commonly recorded within the frequency range of around 25 Hz to nearly 17 kHz, with baleen whales within the range of ~ 25 Hz to 6 kHz, and dolphins at higher frequencies of approximately 2.5–17 kHz. Broadband sounds from physical and anthropogenic sound sources were noticeable at frequencies above ~ 50 Hz. The ambient noise level in Fowlers Bay at frequencies below 100 Hz was relatively low (around 75 dB re 1 µPa²/Hz for the 95% percentile) due to an insignificant contribution of noise from distant shipping. At higher frequencies, the noise level was governed primarily by noise from wind and varied by nearly 30 dB re 1 µPa²/Hz depending on weather conditions, up to around 80 dB re 1 µPa²/Hz for the 95% percentile during periods of strong winds and intense rainfall.

中文翻译：

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南方冬季，南澳大利亚州福勒斯湾的水下声源和环境噪声

2013-2017南方冬季，在南澳大利亚州福勒斯湾（Fowlers Bay）进行的无源录音记录表明，存在多种水下声源。生物来源的声源包括须鲸和齿鲸，鱼和虾。水下声音的物理来源包括风和雨水驱动的噪声，而人为来源的水下声音主要来自船只，偶尔还来自飞机。通常在25 Hz至近17 kHz的频率范围内记录生物声源，鲸鱼在〜25 Hz至6 kHz的范围内记录海豚，海豚在2.5–17 kHz的较高频率下记录。来自物理和人为声源的宽带声音在〜50 Hz以上的频率下很明显。对于95％的百分位点为² / Hz），这是由于远距离运输产生的噪声影响不大。在较高的频率下，噪声水平主要受风噪声的控制，视天气情况而定，变化接近30 dB re 1 µPa ² / Hz，对于95％的百分位数，最高可达80 dB re 1 µPa ² / Hz。强风和强降雨。