This research was supported by the National Natural Science Foundation of China (Grant No. 11804222), the Young Elite Scientists Sponsorship Program by CAST (Grant No. 2018QNRC001), the Key Laboratory of Underwater Acoustic Environment, Institute of Acoustics, Chinese Academy of Sciences (Grant No. SHHJ-KFKT-1901), and the “Chen Guang project” supported by the Shanghai Municipal Education Commission and Shanghai Education Development Foundation.
JASA Express Letters
Underwater acoustics, Noise, Acoustical engineering
This paper derives travel times and arrival angles of head-wave correlations from ocean ambient noise in shallow water over a layered seabed. The upcoming and surface reflected head-wave noise signal received at two receivers from the same interface are correlated, and their travel time differences give the travel times of the head-wave correlations. The arrival angle of head-wave correlations from an interface depends on sound speeds in the layers above and just below. The predictions of head-wave correlations from a seabed with two layers and the corresponding inversion results are verified with simulations.
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Li, J., Siderius, M., Gerstoft, P., Fan, J., & Muzi, L. (2021). Head-wave correlations in layered seabed: Theory and modeling. JASA Express Letters, 1(9), 096001.