The underwater sound distribution generated by natural sources, shipping and trawling activities has been computed by the Quonops© modelling webservice for the Northern Adriatic Sea (NAS) during 2020, a year characterized by the COVID-19 lockdown restrictions. Modelling has been calibrated by using a year-long time series of field measurements covering the domain of interest. Sound levels (50th percentile) ranged between 75 and 90 dB re 1μPa for all the considered frequencies (63 Hz, 125 Hz, 250 Hz third octave bands). Noisier NAS areas match with the shipping lanes and the distribution of trawling activity. Pressure sound indices based on masking effect were computed for two Ecologically/Biologically Significant Marine Areas (EBSA) located in the NAS. Results indicated a significant contribution of vessel and fishery-generated noise to the local soundscape and provide a basis for addressing NAS underwater noise pollution, with special reference to the Marine Spatial Planning approach.

中文翻译：

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北亚得里亚海盆地的自然和航运水下声音分布以及在目标区域的可能应用


Quonops© 建模网络服务计算了 2020 年北亚得里亚海 (NAS) 自然源、航运和拖网活动产生的水下声音分布，这一年的特点是 COVID-19 封锁限制。模型已通过使用涵盖感兴趣领域的长达一年的现场测量时间序列进行了校准。对于所有考虑的频率（63 Hz、125 Hz、250 Hz 第三倍频程），声级（第 50 个百分位）范围在 75 至 90 dB re 1μPa 之间。噪声较大的 NAS 区域与航道和拖网捕捞活动的分布相匹配。针对位于 NAS 的两个具有生态/生物意义的海洋区域 (EBSA) 计算了基于掩蔽效应的压声指数。结果表明，船舶和渔业产生的噪声对当地声景有重大影响，并为解决 NAS 水下噪声污染问题提供了基础，特别是海洋空间规划方法。