Acta Acustica最新文献_第7页

Zonal direct-hybrid aeroacoustic simulation of trailing edge noise using a high-order discontinuous Galerkin spectral element method 基于高阶不连续伽辽金谱元法的带状直接混合气动声学后缘噪声模拟

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2022030

Daniel Kempf, C. Munz

{"title":"Zonal direct-hybrid aeroacoustic simulation of trailing edge noise using a high-order discontinuous Galerkin spectral element method","authors":"Daniel Kempf, C. Munz","doi":"10.1051/aacus/2022030","DOIUrl":"https://doi.org/10.1051/aacus/2022030","url":null,"abstract":"We present the extension of a discontinuous Galerkin framework to zonal direct-hybrid aeroacoustic simulations. This extension provides the ability to simultaneously perform a zonal large eddy simulation (LES), solving the compressible Navier–Stokes equations, and an acoustic propagation simulation, solving the acoustic perturbation equations. In doing so, the acoustic sources are exchanged without using the file system, and the bottleneck of I/O operations is avoided. This approach is well suited for large-scale simulations done in high-performance computing. The zonal LES uses the recently introduced recycling rescaling anisotropic linear forcing as a turbulent inflow method. We present a methodology to model the required Reynolds stresses based on the distribution of the turbulent kinetic energy obtained from solving the Reynolds-averaged Navier–Stokes equations. We show at the example of a turbulent flow over a flat plate and a NACA 64418 trailing edge simulation that the chosen model of the Reynolds stresses is valid. Direct-hybrid simulation results of a NACA 0012 airfoil, including tonal self-noise and a NACA 64418 trailing edge, demonstrate the presented approach’s applicability. This zonal direct-hybrid simulation approach shows great potential for efficient hybrid computational aeroacoustic simulations in high-performance computing.","PeriodicalId":48486,"journal":{"name":"Acta Acustica","volume":"7 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78794873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Effect of slit length on linear and non-linear acoustic transfer impedance of a micro-slit plate 狭缝长度对微狭缝板线性和非线性声传递阻抗的影响

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2021059

Alessia Aulitto, A. Hirschberg, I. L. Arteaga, Esmée L.R.H. Buijssen

{"title":"Effect of slit length on linear and non-linear acoustic transfer impedance of a micro-slit plate","authors":"Alessia Aulitto, A. Hirschberg, I. L. Arteaga, Esmée L.R.H. Buijssen","doi":"10.1051/aacus/2021059","DOIUrl":"https://doi.org/10.1051/aacus/2021059","url":null,"abstract":"The effect of the slit length on the acoustic transfer impedance of micro-slit plates (MSPs) is investigated in the linear and non-linear regime for a specific slit geometry. This geometry is inspired by slits obtained by cutting and bending the plate. MSPs are plates with arrays of slit-shaped perforations, with the width of the order of the acoustic viscous boundary layer thickness. Impedance tube measurements on two accurately manufactured plates are compared to numerical solution of the Linearized Navier-Stokes equations and to analytical limits. The impedance of the plate is obtained by the impedance of a single slit divided by the plate porosity. The resistance of a slit is independent on the slit length and on the plate porosity. In the linear regime the resistance is accurately predicted by a two-dimensional numerical model. In the non-linear regime, the resistance is strongly dependent on the amplitude of the acoustic waves. The inertance of the slit is weakly dependent on the slit length and on the plate porosity, for low and moderate amplitudes. For high amplitudes, a complicated amplitude dependency of the inertia of short slits is found. One expects that most of the conclusions obtained can be generalised to other slit geometries.","PeriodicalId":48486,"journal":{"name":"Acta Acustica","volume":"58 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80917235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

2D phononic-crystal Luneburg lens for all-angle underwater sound localization 二维声子晶体Luneburg透镜全角度水声定位

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2021058

Yongdu Ruan, Xu Liang

{"title":"2D phononic-crystal Luneburg lens for all-angle underwater sound localization","authors":"Yongdu Ruan, Xu Liang","doi":"10.1051/aacus/2021058","DOIUrl":"https://doi.org/10.1051/aacus/2021058","url":null,"abstract":"Phononic crystals are well known for acoustic wave manipulation which may have potential application in an underwater acoustic detection system. In this work, we design and simulate a two-dimensional Luneburg lens based on gradient-index (GRIN) phononic crystal that is composed of PLA-Air inclusion, and a novel application of GRIN phononic crystals is proposed to sound localization. The Luneburg lens has a broadband working range, from 1500 Hz to 7500 Hz, for acoustic wave focusing with sensitive directivity and signal-to-noise improvement. By searching maximum wave intensity’s position of the focusing beam, the propagating direction of an unknown sound wave can be directly recognized covering 360°. Besides, we redesign the conventional square-lattice Luneburg lenses using annular lattices for better performance. The annular-lattice Luneburg lens overcomes the weakness of configuration defect due to the square lattice. The numerical results show that the redesign Luneburg lenses have high accuracy for distance measurement from 5 m to 35 m through the triangulation location. In a word, this work tries to explore a novel application of phononic crystals in underwater acoustic positioning and navigation technology.","PeriodicalId":48486,"journal":{"name":"Acta Acustica","volume":"112 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87851609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

On the identification and assessment of underlying acoustic dimensions of soundscapes 论声景的底层声学维度的识别与评价

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2022042

Jakob Bergner, J. Peissig

{"title":"On the identification and assessment of underlying acoustic dimensions of soundscapes","authors":"Jakob Bergner, J. Peissig","doi":"10.1051/aacus/2022042","DOIUrl":"https://doi.org/10.1051/aacus/2022042","url":null,"abstract":"The concept of soundscapes according to ISO 12913-1/-2/-3 proposes a descriptive framework based on a triangulation between the entities acoustic environment, person and context. While research on the person-related dimensions is well established, there is not yet complete agreement on the relevant indicators and dimensions for the pure description of acoustic environments. Therefore, this work attempts to identify acoustic dimensions that actually vary between different acoustic environments and thus can be used to characterize them. To this end, an exploratory, data-based approach was taken. A database of Ambisonics soundscape recordings (approx. 12.5 h) was first analyzed using a variety of signal-based acoustic indicators (Ni = 326) within the categories loudness, quality, spaciousness and time. Multivariate statistical methods were then applied to identify compound and interpretable acoustic dimensions. The interpretation of the results reveals 8 independent dimensions “Loudness”, “Directivity”, “Timbre”, “High-Frequency Timbre”, “Dynamic Range”, “High-Frequency Amplitude Modulation”, “Loudness Progression” and “Mid-High-Frequency Amplitude Modulation” to be statistically relevant. These derived latent acoustic dimensions explain 48.76% of the observed total variance and form a physical basis for the description of acoustic environments. Although all baseline indicators were selected for perceptual reasons, validation must be done through appropriate listening tests in future.","PeriodicalId":48486,"journal":{"name":"Acta Acustica","volume":"48 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80139662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Structure-borne sound sources in buildings – Estimating the uncertainty of source properties and installed power from interlaboratory test results 建筑物中结构传播的声源。从实验室间试验结果估计声源特性和安装功率的不确定度

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2022012

V. Wittstock, J. Scheck, M. Villot

引用次数: 1

Hybrid multi-harmonic model for the prediction of interaural time differences in individual behind-the-ear hearing-aid-related transfer functions 混合多谐模型用于预测个体耳后助听器相关传递函数的耳间时差

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2022020

Florian Pausch, S. Doma, J. Fels

{"title":"Hybrid multi-harmonic model for the prediction of interaural time differences in individual behind-the-ear hearing-aid-related transfer functions","authors":"Florian Pausch, S. Doma, J. Fels","doi":"10.1051/aacus/2022020","DOIUrl":"https://doi.org/10.1051/aacus/2022020","url":null,"abstract":"Spatial sound perception in aided listeners partly relies on hearing-aid-related transfer functions (HARTFs), describing the directional acoustic paths between a sound source and the hearing-aid (HA) microphones. Compared to head-related transfer functions (HRTFs), the HARTFs of behind-the-ear HAs exhibit substantial differences in spectro-temporal characteristics and binaural cues such as interaural time differences (ITDs). Since assumptions on antipodal microphone placement on the equator of a three-concentric sphere are violated in such datasets, predicting the ITDs via Kuhn’s simple analytic harmonic model entails excessive errors. Although angular ear-canal offsets have been addressed in an extended Woodworth model, the prediction errors remain large if the frequency range does not comply with the model specifications. Tuned to the previously inaccurately modelled frequency range between 500 Hz and 1.5 kHz, we propose a hybrid multi-harmonic model to predict the ITDs in HRTFs and HARTFs for arbitrary directions in the horizontal plane with superior accuracy. The target model coefficients are derived from individual directional measurements of 30 adults, wearing two dual-microphone behind-the-ear HAs and two in-ear microphones. Model individualisation is facilitated by the availability of polynomial weights that are applied to subsets of individual anthropometric and HA features to estimate the target model coefficients. The model is published as part of the Auditory Modeling Toolbox (AMT, pausch2022) and supplemented with the individual features and directional datasets.","PeriodicalId":48486,"journal":{"name":"Acta Acustica","volume":"45 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90574786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Aeroacoustic formulations for confined flows based on incompressible flow data 基于不可压缩流动数据的受限流动气动声学公式

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2022041

Paul Maurerlehner, S. Schoder, J. Tieber, Clemens Freidhager, H. Steiner, G. Brenn, Karl-Heinz Schäfer, A. Ennemoser, M. Kaltenbacher

{"title":"Aeroacoustic formulations for confined flows based on incompressible flow data","authors":"Paul Maurerlehner, S. Schoder, J. Tieber, Clemens Freidhager, H. Steiner, G. Brenn, Karl-Heinz Schäfer, A. Ennemoser, M. Kaltenbacher","doi":"10.1051/aacus/2022041","DOIUrl":"https://doi.org/10.1051/aacus/2022041","url":null,"abstract":"The hybrid aeroacoustic approach is an efficient way to address the issue of the disparity of scales in Computational AeroAcoustics (CAA) at low Mach numbers. In the present paper, three wave equations governing propagation of flow-induced sound of low Mach number flows, namely the Perturbed Convective Wave Equation (PCWE), Ribner’s Dilatation (RIB) equation, and Lighthill’s wave equation, are applied using the Finite Element Method (FEM). An airflow through a circular pipe with a half-moon-shaped orifice at three operating flow speeds is considered, where validation data from measurements on a dedicated test rig is available. An extensive analysis of the flow field is provided based on the results of the incompressible flow simulation. The resulting acoustic source terms are investigated, and the relevant source term contributions are determined. The results of the acoustic propagation simulations revealed that the PCWE and RIB are best suited for the present task. The overall deviation of the predicted pressure spectra from the measured mean values amounted to 2.26 and 2.13 times the standard deviation of the measurement compared to 3.55 for Lighthill’s wave equation. Besides reliably predicting the flow-induced sound, the numerical procedure of source term computation is straightforward for PCWE and RIB, where the source term contributions, shown to be relevant, solely consist of time derivatives of the incompressible pressure. In contrast, the Lighthill source term involves spatial derivatives and, thus, is strongly dependent on the spatial resolution and the numerical method actually used for approximating these terms.","PeriodicalId":48486,"journal":{"name":"Acta Acustica","volume":"23 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82991728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Interaction between double nonspherical bubbles in compressible liquid under the coupling effect of ultrasound and electrostatic field 超声与静电场耦合作用下可压缩液体中双非球形气泡的相互作用

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2022048

Jin-Jie Deng, M. Yu, Ri-Fu Yang

引用次数: 0

Pilot study on the influence of spatial resolution of human voice directivity on speech perception 人类语音指向性空间分辨率对语音感知影响的初步研究

IF 1.4 3区物理与天体物理

Acta Acustica Pub Date : 2022-01-01 DOI: 10.1051/aacus/2022006

Aurian Quélennec, P. Luizard

引用次数: 0

In-flight directivity and sound power measurement of small-scale unmanned aerial systems 小型无人机系统的飞行指向性和声功率测量