Journal of Theoretical and Computational Acoustics最新文献

Numerical Integration and Angular Spectrum Modeling of Resonant and Non-Resonant Wave Interaction with a Solid Plate 共振和非共振波与实心板相互作用的数值积分和角频谱建模

Journal of Theoretical and Computational Acoustics Pub Date : 2024-04-01 DOI: 10.1142/s2591728524500063

Mathias M. Saether

引用次数: 0

Analysis of deep-water low-frequency sound multipath arrivals and interference striation patterns 深水低频声音多径到达和干扰条纹模式分析

Journal of Theoretical and Computational Acoustics Pub Date : 2024-04-01 DOI: 10.1142/s2591728524500051

Zhikang Ma, Haigang Zhang, Lijia Gong, Jinhuai Xie, Jianbo Zhou

引用次数: 0

Investigation of Geoacoustic Parameters of Fine-Grained Sediment in the South China Sea Using Sequential Inversion 利用序列反演研究南海细粒沉积物的地声参数

Journal of Theoretical and Computational Acoustics Pub Date : 2024-02-01 DOI: 10.1142/s2591728523500226

Wang Hao, Rui Duan, Kunde Yang

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引用次数: 0

Investigation of Geoacoustic Parameters of Fine-Grained Sediment in the South China Sea Using Sequential Inversion 利用序列反演研究南海细粒沉积物的地声参数

Journal of Theoretical and Computational Acoustics Pub Date : 2024-02-01 DOI: 10.1142/s2591728523500226

Wang Hao, Rui Duan, Kunde Yang

{"title":"Investigation of Geoacoustic Parameters of Fine-Grained Sediment in the South China Sea Using Sequential Inversion","authors":"Wang Hao, Rui Duan, Kunde Yang","doi":"10.1142/s2591728523500226","DOIUrl":"https://doi.org/10.1142/s2591728523500226","url":null,"abstract":"Broadband signals interacting with deep ocean fine-grained sediment are crucial in shaping the acoustic field of the geometric shadow zone. These signals travel through both the seabed reflected path and the refracted path. In this article, a sequential inversion scheme is employed to estimate the geoacoustic parameters in abyssal clay sediments. This inversion is based on seabed reflection loss data at different frequencies, as well as travel time difference data between refractions and reflections obtained from the South China Sea Experiment in 2018. Depth-dependent profiles of geoacoustic parameters are formulated using Bernstein polynomials. The polynomial coefficients and their posterior probability density functions are efficiently estimated using the adaptive simplex simulated annealing method and an approximate variational inference technique known as Variational Bayesian Monte Carlo. This technique demonstrates superior efficiency and comparable accuracy to Markov Chain Monte Carlo sampling. The inversion results indicate that the abyssal clay sediments in this area exhibit a positive sound speed gradient and relatively low attenuation, both with high probabilities. The deduced seabed model accurately predicts the transmission loss, aligning well with the experimental data.","PeriodicalId":506059,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"229 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139831971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rayleigh scattering from a sphere located near a planar rigid boundary 位于平面刚性边界附近的球体的瑞利散射

Journal of Theoretical and Computational Acoustics Pub Date : 2024-01-26 DOI: 10.1142/s2591728524500026

A. Maksimov

引用次数: 0