论文标题
在连续分层的介质中，用角光谱方法的声源定位
Acoustic Source Localization with the Angular Spectrum Approach in Continuously Stratified Media
论文作者
论文摘要
角频谱方法（ASA）---一种用于计算声场的快速频域方法---在具有较高计算效率的均质媒体中可以被动源定位和建模向前传播。在这里，我们表明，如果培养基是连续分层的，则可以在任意深度下获得该场的一阶分析解决方案。我们的模拟表明，与未校正的ASA相比，分层的ASA解决方案可以实现准确的源本地化（从1.2 $ \ pm $ 0.3到0.49 $ \ pm $ 0.3波长在与生物医学有关\ sim $ 10）声学应用。总体而言，总计算是在标准硬件上的订单上毫秒（225美元$ \ pm $ 84毫秒，而在所有情况下，同质ASA配方的$ 78 \ pm63 $ ms）。总体而言，结果表明所提出的ASA相校正可以在连续分层的环境中进行有效，准确的方法来源定位。
The angular spectrum approach (ASA)---a fast, frequency domain method for calculation of the acoustic field---enables passive source localization and modeling forward propagation in homogeneous media with high computational efficiency. Here we show that, if the medium is continuously stratified, a first-order analytical solution may be obtained for the field at arbitrary depth. Our simulations show that the stratified ASA solution enables accurate source localization as compared to the uncorrected ASA (error from 1.2$\pm$0.3 to 0.49$\pm$0.3 wavelengths) at scalings relevant to biomedical ($kL \sim$ 500, where $L$ is the length of the measurement aperture), underwater ($kL \sim$ 800), and atmospheric ($kL \sim$ 10) acoustic applications. Overall the total computation was on the order milliseconds on standard hardware (225$\pm$84 ms, compared with $78\pm63$ ms for the homogeneous ASA formulation over all cases). Collectively, the results suggest the proposed ASA phase correction enables efficient and accurate method for source localization in continuously stratified environments.
