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Chinese Journal of Acoustics 2024年第2期43卷 155-172页

作者： CHEN Changxiong PENG Zilong SONG Hao FAN Jun XUE Yaqiang School of Energy and Power Engineering Jiangsu University of Science and TechnologyZhenjiang 212100 Systems Engineering Research Institute Beijing100094 State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240

A fast prediction method is presented for the full-space bistatic scattering sound field of the underwater stiffened double cylindrical shell. The scattering sound field is represented as the product of the acoustic scattering transfer function and the sound source density function. The target surface grid information and a small amount of simulation or experimentation multistatic scattering sound pressure data are used as known information to forecast other bistatic scattering sound fields with the help of numerical integration, matrix theory, and least squares method. The scattered sound pressure data from simulation of the finite element method(FEM) and experimental tests are used as input to calculate the multistatic scattered sound field of the underwater stiffened double cylindrical shell, respectively. The calculated results are compared with those calculated exclusively by the FEM, and the effects of different input data and calculation frequencies on the calculation results are discussed. The results show that the proposed method can predict the full-space bistatic scattered sound field of the target when the surface structure and part of the scattered sound field data are known. The greater amount of known scattered sound pressure data and lower computational frequency lead to higher predicted accuracy.

关键词： sound scattering cylindrical

Effect of sound speed profile on the structure of long-range acoustic pulse

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Chinese Journal of Acoustics 2024年第1期43卷 64-81页

作者： WU Shuanglin QIN Jixing LI Zhenglin WU Yushen ZHANG Renhe State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 School of Ocean Engineering and Technology Sun Yat-sen UniversityZhuhai 519000 Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082

The time arrival structure of acoustic pulse signals propagating in ocean waveguides is of great significance for underwater acoustic communication and navigation. Using the deep-sea sound propagation data from the experiments respectively conducted in the East Indian Ocean(EIO) and the South China Sea(SCS) with explosion sources near the sound channel axis(SCA), long-range transmission loss(TL) and time arrival structure of acoustic pulses for different sound speed profiles(SSPs) are compared. In the EIO environment, sound energy transmitting along the SCA is relatively large, and the corresponding signals arrive first, whereas signals propagating away from the SCA arrive late. In the full receiving depth, it shows a branch structure where the waveform near the SCA arrives earlier than other depths, which is totally different with the characteristics of the sound pulse in the SCS. Combined with the parametric mathematical model of deep-sea sound channel, the influence mechanism of SSP on the time arrival structure of long-range pulse propagation is theoretically analyzed, which well explains the phenomenon observed in the two experiments.

关键词： depths Indian sound

Linear inversion of geoacoustic parameters using reflection characteristics of sediment layer with low sound speed

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Chinese Journal of Acoustics 2024年第2期43卷 133-154页

作者： LI Zhanglong HU Changqing ZHAO Mei YANG Xuefeng Shanghai Acoustics Laboratory Chinese Academy of SciencesShangha 201815 University of Chinese Academy of Sciences Beijing 100049

In order to improve the inversion efficiency and reduce the coupling of the geoacoustic parameters, a linear inversion method of the geoacoustic parameters of sediment layer with low sound speed is proposed. Based on the reflection coefficient of the plane wave of the two-layer seafloor from the quasi-linear sound speed profile, the relationship between the different reflection characteristics and the relevant geoacoustic parameters is analyzed, including the angle of intromission and the maximum reflection loss at the angle of intromission, interference fringe, and the corresponding cost function is constructed.Combined with sensitivity analysis and stepwise inversion strategy, geoacoustic parameters of sedimentary layer with low sound speed are inversed step by step. This method is applicable to the case that the sound speed gradient of the low sound speed sediment layer is constant. The method is verified by part of the measured seabed reflection loss data from the new England mud patch. The inversion results are basically consistent with the relevant trans-dimensional inversion results, the inversion error is 0.1% for the sound velocity ratio, 0.3% for the density ratio, 14.6% for the absorption coefficient, and 15.8% for the sound speed gradient. The proposed method not only effectively weakens the coupling between some geoacoustic parameters, but also gives the best estimate of the power term that determines the shape of the quasi-linear sound speed profile.

关键词： sound layer coupling

Multi-objective optimization design of spherical transducer

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Chinese Journal of Acoustics 2024年第1期43卷 113-131页

作者： ZHANG Xi LI Hongguang ZHAO Xie XIONG Hanlin MENG Guang State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240 Kunming Shipbuilding Equipment Research and Test Center Kunming 650051

In order to solve the mixed nonlinear multi-objective optimization problem of discrete/continuous variables of the spherical transducer under the multi-constraint conditions, the electrical-mechanical-acoustic model of the spherical transducer is built based on the equivalent circuit theory. The multi-objective optimization mathematical model of the spherical transducer is constructed. The transmitting sound level, input electric power and mass are taken as the optimization objective functions, and the material property parameters, structural size parameters, frequency range and input voltage are taken as the design variables. Besides, the physical properties such as piezoelectric ceramic depolarization,structural strength limit, power capacity and the value of design variables are taken as constraints. The multi-objective optimization design of the spherical transducer is carried out by using the non-dominated sorting genetic algorithm-II(NSGA-II), and the Pareto front solution set is obtained. The effectiveness of the optimization results is verified by experiments. The results show that the transducer prototype designed and manufactured by the multi-objective optimization method reduces the input power by 32.8% and the mass by 27.4% under the premise of meeting the requirements of the transmitting sound level. The results are of great value to the optimization design of transmitting transducer under severe conditions.

关键词： optimization sorting sound

Auditory Narrative in Toni Morrison’s Song of Solomon

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Cultural and Religious Studies 2024年第6期12卷 388-394页

作者： LI Mingjiao Guangdong University of Foreign Studies GuangzhouChina Guangzhou Xinhua University GuangzhouChina

This article primarily explores the centrality of sound and listening in Toni Morrison’s literary text.Drawing on theories on sound cultural studies,narratology,and cultural identity,this essay analyzes Morrison’s representation of sound and its significance on characterization,plot,and theme in Song of Solomon.Morrison’s literary sounds-voices of oral storytelling,the sound of music,and the protagonist Milkman Dead’s listening experiences are deeply rooted in African American sound culture.A close analysis of her sound writing in Song of Solomon helps to give the reader a glimpse of the soundscape of African American culture as well as the vital role listening plays in African American survival,endurance,and cultural identification.

关键词： sound listening black music cultural identity

RHAPSODY IN UNITY Composing the Sino-American cultural mosaic

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Beijing Review 2024年第1期67卷 20-21页

作者： Zhao Wei 不详

The air in the concert hall of the National Center for the Performing Arts(NCPA)in Beijing was thick with anticipation on December 9,2023.In this charged atmosphere,violist extraordinaire Paul Neubauer strode to the edge of the stage.Bow in hand,he conjured from his viola a mesmerizing sound reminiscent of a chorus of birds in joyful song.The notes fluttered and soared,enveloping the audience in an enchanting forest soundscape.

关键词： thick forest sound

Enhancing direct-path relative transfer function using deep neural network for robust sound source localization

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CAAI Transactions on Intelligence Technology 2022年第3期7卷 446-454页

作者： Bing Yang Runwei Ding Yutong Ban Xiaofei Li Hong Liu Key Laboratory of Machine Perception Shenzhen Graduate SchoolPeking UniversityBeijingChina Westlake University&Westlake Institute for Advanced Study HangzhouChina SAIIL Massachusetts General HospitalBostonMassachusettsUSA CSAIL Massachusetts Institute of Technology(MIT)CambridgeMassachusettsUSA

This article proposes a deep neural network(DNN)-based direct-path relative transfer function(DP-RTF)enhancement method for robust direction of arrival(DOA)estimation in noisy and reverberant environments.The DP-RTF refers to the ratio between the directpath acoustic transfer functions of the two microphone channels.First,the complex-value DP-RTF is decomposed into the inter-channel intensity difference,and sinusoidal functions of the inter-channel phase difference in the time-frequency domain.Then,the decomposed DP-RTF features from a series of temporal context frames are utilized to train a DNN model,which maps the DP-RTF features contaminated by noise and reverberation to the clean ones,and meanwhile provides a time-frequency(TF)weight to indicate the reliability of the mapping.The DP-RTF enhancement network can help to enhance the DP-RTF against noise and reverberation.Finally,the DOA of a sound source can be estimated by integrating the weighted matching between the enhanced DP-RTF features and the DP-RTF templates.Experimental results on simulated data show the superiority of the proposed DP-RTF enhancement network for estimating the DOA of the sound source in the environments with various levels of noise and reverberation.

关键词： network sound transfer

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CAAI Transactions on Intelligence Technology 2022年第1期7卷 26-33页

作者： Hong Liu Peipei Yuan Bing Yang Ge Yang Yang Chen Key Laboratory of Machine Perception Shenzhen Graduate SchoolPeking UniversityShenzhenChina School of Artificial Intelligence Chongqing University of TechnologyChongqingChina Yanka Kupala State University of Grodno GrodnoBelarus

Various time-frequency(T-F)masks are being applied to sound source localization tasks.Moreover,deep learning has dramatically advanced T-F mask estimation.However,existing masks are usually designed for speech separation tasks and are suitable only for single-channel signals.A novel complex-valued T-F mask is proposed that reserves the head-related transfer function(HRTF),customized for binaural sound source localization.In addition,because the convolutional neural network that is exploited to estimate the proposed mask takes binaural spectral information as the input and output,accurate binaural cues can be preserved.Compared with conventional T-F masks that emphasize single speech source–dominated T-F units,HRTFreserved masks eliminate the speech component while keeping the direct propagation path.Thus,the estimated HRTF is capable of extracting more reliable localization features for the final direction of arrival estimation.Hence,binaural sound source localization guided by the proposed T-F mask is robust under noisy and reverberant acoustic environments.The experimental results demonstrate that the new T-F mask is superior to conventional T-F masks and lead to the better performance of sound source localization in adverse environments.

关键词： estimation. sound function

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在这里,音乐属于每一个人

疯狂英语（新悦读） 2024年第4期 11-13,75页

作者：江海连不详

The Record Co.创始人马特·麦克阿瑟致力于将音乐带给所有人,特别是那些从未考虑过自己会进入音乐领域的人。1 SanyéMylo􀆳s eyes twinkle with excitement when he stands in the sound booth of The Record Co.in Boston,eager to bring his creation to life.With the press of a button,his latest rap track fills the room.“I didn􀆳t know spaces like this existed,”says Mylo,who grew up in the low‑income neighborhood of Dorchester.He is one of the young musicians who,thanks to The Record Co.,has turned his music into a full‑time occupation.

关键词： neighborhood occupation sound

Improvement of Seafloor Positioning Through Correction of sound Speed Profile Temporal Variation

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IEEE/CAA Journal of Automatica Sinica 2023年第4期10卷 1099-1101页

作者： Miao Yu Kuijie Cai Cuie Zheng Dajun Sun Acoustic Science and Technology Laboratory Harbin Engineering UniversityHarbin 150001 Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University) Ministry of Industry and Information TechnologyHarbin 150001 College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001China College of Mathematical Sciences Harbin Engineering UniversityHarbin 150001China

Dear Editor,This letter proposes a high-precision seafloor transponder positioning method based on the correction of sound speed profile(SSP)temporal variation.In the proposed method,the ocean sound speed error is modeled as the temporal variation of a background SSP,and the linearized expression of the acoustic travel time with respect to the sound speed coefficient is derived based on the ray acoustic model.Moreover,the proposed method introduces the constraint of acoustic ranging observations between seafloor transponders and determines the weights of travel time and ranging observations using Akaike’s Bayesian information criterion(ABIC)to reduce the positioning error caused by the correlation between sound speed and position parameters.The experimental results in the South China Sea show that the proposed method performs better than the global navigation satellite system-acoustic ranging combined positioning solver(GARPOS)[1],in terms of rigid distance errors and long baseline positioning accuracy.

关键词： ocean travel sound