Dediu Simona M, Siegmann William L, Carey William M
Department of Mathematical Sciences, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.
J Acoust Soc Am. 2007 Aug;122(2):EL23-8. doi: 10.1121/1.2754077.
Experiments have been conducted near the site of AMCOR Borehole 6010 on the New Jersey Shelf to evaluate propagation predictability in sandy shallow-water environments. The influence of a nonlinear frequency dependence of the sediment volume attenuation in the uppermost sediment layer at this location is examined. Previously it was determined that a frequency power-law exponent of 1.5 was required for the best modeling of experimental results over the band 50-1000 Hz. The approach here references the attenuation to an accepted value at 1 kHz and makes extensive comparisons between measurements and calculations, to determine a power-law exponent of 1.85+/-0.15.
已在新泽西海岸的AMCOR 6010钻孔附近开展实验，以评估沙质浅水环境中的传播可预测性。研究了该位置最上层沉积物中沉积物体积衰减的非线性频率依赖性影响。此前已确定，在50 - 1000 Hz频段内，为了对实验结果进行最佳建模，频率幂律指数需为1.5。此处的方法是将衰减参考至1 kHz时的公认值，并对测量值和计算值进行广泛比较，以确定幂律指数为1.85±0.15。
