Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA.
J Acoust Soc Am. 2011 Feb;129(2):642-51. doi: 10.1121/1.3518770.
Measurements (1994-2007) from four cabled-to-shore hydrophone systems located off the North American west coast permit extensive comparisons between "contemporary" low frequency ship traffic noise (25-50 Hz) collected in the past decade to measurements made over 1963-1965 with the same in-water equipment at the same sites. An increase of roughly 10 dB over the band 25-40 Hz at one site has already been reported [Andrew et al., Acoust. Res. Lett. Online 3(2), 65-70 (2002)]. Newly corrected data from the remaining three systems generally corroborate this increase. Simple linear trend lines of the contemporary traffic noise (duration 6 to 12+ years) show that recent levels are slightly increasing, holding steady, or decreasing. These results confirm the prediction by Ross that the rate of increase in traffic noise would be far less at the end of the 20th century compared to that observed in the 1950s and 1960s.
自 1994 年至 2007 年，北美西海岸四个海底电缆-岸基水听器系统的测量数据，使得对过去十年中“当代”低频船舶交通噪声（25-50Hz）与同一地点、同一水下设备在 1963-1965 年所做的测量之间进行了广泛比较。[Andrew 等人，《声学研究快报在线》3（2），65-70（2002）]，已有报道称在一个地点的 25-40Hz 频段上增加了约 10dB。其余三个系统的新修正数据通常证实了这一增长。当代交通噪声（持续时间 6 至 12 年以上）的简单线性趋势线显示，最近的水平略有增加、保持稳定或减少。这些结果证实了 Ross 的预测，即在 20 世纪末，交通噪声的增长率将远低于 20 世纪 50 年代和 60 年代观察到的增长率。
