Acoustics Australia最新文献_第4页

A Composite Sound Insulator Composed of a Helix and a Resonator Array 一种由螺旋和谐振器阵列组成的复合隔声体

IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-09-03 DOI: 10.1007/s40857-025-00359-x

Wenqing Diao, Ningwo Pei, Li Fan, Shuyi Zhang, Liping Cheng, Xiaodong Xu

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Experimental Study on the Effects of Geometrical Misalignment and Shape Modification on Ring Tone 几何错位和形状修正对铃声影响的实验研究

IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-08-29 DOI: 10.1007/s40857-025-00354-2

Kazuo Matsuura, Akshoy Ranjan Paul, Arun Kumar Perumal

{"title":"Experimental Study on the Effects of Geometrical Misalignment and Shape Modification on Ring Tone","authors":"Kazuo Matsuura, Akshoy Ranjan Paul, Arun Kumar Perumal","doi":"10.1007/s40857-025-00354-2","DOIUrl":"10.1007/s40857-025-00354-2","url":null,"abstract":"<div><p>The sound produced by placing a coaxial ring downstream of a circular jet is called a ring tone. It is reinforced by a phase-matching feedback process through the processes of the growth of vortex rings in the jet shear, its impingement on the ring, the upstream propagation of pressure waves and the perturbation of the jet shear layer at the nozzle exit. In this study, we investigated the effects of geometrical misalignment and shape modification on the ring tone for the first time. In particular, the effects of changes in the angle of attachment of the ring to the nozzle exit, its radial position relative to the rotational axis of the round jet, the surface roughness of the inner wall of the nozzle exit, and the diameter and thickness of the ring on the ring tone are shown. These misalignments and shape modifications result in different Sound Pressure Level (SPL) distributions, depending on angular deviation, radial position deviation, and surface roughness height. Smoke visualization of the baseline ring tone was also conducted. The surface roughness muffles the peak sound, depending on the impingement length, and the ring tone occurs when the inner diameter of the ring <i>d</i><sub>i</sub> satisfies the condition <i>d</i><sub>i</sub>/(<i>d</i><sub>0</sub> + 2<i>δ</i><sub>j</sub>) < 1.28 where <i>d</i><sub>0</sub> is the inner diameter of the nozzle exit and <i>δ</i><sub>j</sub> is the thickness of the jet shear layer.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"54 :","pages":"63 - 75"},"PeriodicalIF":1.8,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

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Modeling the Vibroacoustic Behavior of Submerged Stiffened Cylindrical Shells Coupled to Non-axisymmetric Internal Structures and Excited by a Turbulent Boundary Layer 紊流边界层激励下与非轴对称内部结构耦合的水下加劲圆柱壳振动声特性建模

IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-08-24 DOI: 10.1007/s40857-025-00357-z

Valentin Meyer, Laurent Maxit

{"title":"Modeling the Vibroacoustic Behavior of Submerged Stiffened Cylindrical Shells Coupled to Non-axisymmetric Internal Structures and Excited by a Turbulent Boundary Layer","authors":"Valentin Meyer, Laurent Maxit","doi":"10.1007/s40857-025-00357-z","DOIUrl":"10.1007/s40857-025-00357-z","url":null,"abstract":"<div><p>Modeling the vibroacoustic behavior of structures excited by random pressure fields, such as turbulent boundary layers (TBL), is of interest for naval applications. Most works in the literature address the problem by considering periodically stiffened plates or shells. These studies have highlighted the role of Bloch–Floquet waves in increasing radiated pressure in certain frequency bands. However, in industrial applications, the stiffened structure excited by the TBL is generally coupled with internal structures such as bulkheads, floor partitions and engine foundations. To understand how these internal structures can modify the propagation of Bloch–Floquet waves and, consequently, the pressure radiated in the far field, it is necessary to have an efficient simulation tool. We propose developing a dedicated numerical process to estimate the radiated pressure from a cylindrical shell stiffened by axisymmetric/non-axisymmetric internal frames and excited by a homogeneous TBL. The process is based on the wavenumber-point reciprocity principle, which states that the sensitivity functions at a given point <i>M</i> correspond to the spectral responses of the system when excited by a monopole located at <i>M</i>. The condensed transfer functions approach is employed to derive these responses, thereby partitioning the problem: The immersed cylindrical shell is represented by an analytical model, whereas the internal frames are described using finite element models. Numerical results highlight a significant influence of the internal structure on the acoustic radiation of the stiffened shell in far field, induced by the coupling of the circumferential modes.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"53 3","pages":"329 - 339"},"PeriodicalIF":1.8,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145698497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

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IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-08-14 DOI: 10.1007/s40857-025-00356-0

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Analysis of Nonlinear Acoustic Vibrations of an Axially Moving Submerged Double-Walled Cylindrical Shell 水下双壁圆柱壳轴向运动非线性声振动分析

IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-07-11 DOI: 10.1007/s40857-025-00355-1

Amir Hossein Orafa, Mohammad Mahdi Jalili, Ali Reza Fotuhi

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Assessment of Urban Quiet Areas in the Context of Nature-Based Solutions: Istanbul Historical Peninsula Example 基于自然的解决方案背景下的城市安静区评估：伊斯坦布尔历史半岛的例子

IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-07-01 DOI: 10.1007/s40857-025-00353-3

Gülşen Akın Güler, Aslı Özçevik Bilen

{"title":"Assessment of Urban Quiet Areas in the Context of Nature-Based Solutions: Istanbul Historical Peninsula Example","authors":"Gülşen Akın Güler, Aslı Özçevik Bilen","doi":"10.1007/s40857-025-00353-3","DOIUrl":"10.1007/s40857-025-00353-3","url":null,"abstract":"<div><p>It has been emphasised in previous studies that the definition of quiet areas, which are specified as areas to be identified and protected in the Environmental Noise Directive (END) in force for European Member States, cannot be reduced to ‘the area below certain limit values for certain noise indicator values’ and the positive effects of the presence of natural elements such as natural sounds, plants and aquatic environment on the perception of quiet areas. Therefore, this soundscape study examines not only the levels of sound, but also how sound sources, the acoustic environment, auditory perception, and personal interpretation interact in shaping our experience of a sound environment. This study investigates the potential of quiet areas to be included within the scope of nature-based solutions (NBS) through the example of Istanbul Historic Peninsula. In this study, data were collected from selected urban open and green spaces within the Istanbul Historic Peninsula through noise mapping, in situ sound recordings, and questionnaire-based surveys, all conducted in accordance with established soundscape standards. The collected data were analysed to explore the relationships between the sound environment and various physical environmental factors that influence the perception of quietness in urban settings. These relationships were further evaluated within the framework of nature-based solutions (NBS) strategies, with a particular focus on how such quiet areas can contribute to urban greening practices. Finally, the study discusses how insights gained from the soundscape analysis can inform space planning and design in urban contexts, emphasising the integration of acoustic quality in green infrastructure planning.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"53 2","pages":"269 - 284"},"PeriodicalIF":1.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40857-025-00353-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Reducing Tonal Noise of Contra-Rotating Unmanned Aerial System Rotors via Blade Rake Angle Adjustment 通过调整叶片前倾角降低对转无人机系统旋翼的噪声

IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-05-31 DOI: 10.1007/s40857-025-00352-4

Riul Jung, Carlos Ramos-Romero, Michael J. Kingan, Deepak Akiwate, Antonio J. Torija

{"title":"Reducing Tonal Noise of Contra-Rotating Unmanned Aerial System Rotors via Blade Rake Angle Adjustment","authors":"Riul Jung, Carlos Ramos-Romero, Michael J. Kingan, Deepak Akiwate, Antonio J. Torija","doi":"10.1007/s40857-025-00352-4","DOIUrl":"10.1007/s40857-025-00352-4","url":null,"abstract":"<div><p>This paper investigates the effect of blade rake angle on the tonal noise produced by contra-rotating rotor systems suitable for use on small multi-rotor unmanned aerial systems (UAS). This investigation utilises semi-analytical, numerical, and experimental methods to investigate the physics of the noise generation mechanisms, generated noise levels and the psychoacoustic characteristics of this noise. Computational fluid dynamics (CFD) simulations and semi-analytical models are employed to predict the periodic unsteady loading on the rotor blades, and the loading data are used to predict the radiated noise for rotor systems with different blade rake angles. Experimental measurements of the noise produced by a rotor system with no blade rake angle were used as a baseline case, and predictions were used to synthesise and auralise the sound produced by rotor systems with different rake angles for psychoacoustic analysis. The results show that increasing the blade rake angle generally reduces the amplitude of prominent interaction tones due to the reduction in the unsteady loading along the blade span caused by bound potential field interactions as the blade rake angle increases. This causes a reduction in the perceived tonal noise level.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"53 2","pages":"201 - 222"},"PeriodicalIF":1.8,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40857-025-00352-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-05-08 DOI: 10.1007/s40857-025-00351-5

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Correction to: Statistical Energy Analysis of Membrane-Type Acoustic Metamaterials in Double-Wall Arrangements 修正：双壁布置中膜型声学超材料的统计能量分析

IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-04-23 DOI: 10.1007/s40857-024-00341-z

César Abraham Luna Estrada, Alejandro Cuauhtémoc Ramírez Reivich

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Robust Classification of Urban Sounds in Noisy Environments: A Novel Approach Using SPWVD-MFCC and Dual-Stream Classifier 基于SPWVD-MFCC和双流分类器的噪声环境下城市声音鲁棒分类方法

IF 1.8 4区物理与天体物理

Acoustics Australia Pub Date : 2025-03-24 DOI: 10.1007/s40857-025-00350-6

Bo Peng, Kevin I-Kai Wang, Waleed H. Abdulla

{"title":"Robust Classification of Urban Sounds in Noisy Environments: A Novel Approach Using SPWVD-MFCC and Dual-Stream Classifier","authors":"Bo Peng, Kevin I-Kai Wang, Waleed H. Abdulla","doi":"10.1007/s40857-025-00350-6","DOIUrl":"10.1007/s40857-025-00350-6","url":null,"abstract":"<div><p>Urban sound classification is essential for effective sound monitoring and mitigation strategies, which are critical to addressing the negative impacts of noise pollution on public health. While existing methods predominantly rely on Short-Term Fourier Transform (STFT)-based features like Mel-Frequency Cepstral Coefficients (MFCC), these approaches often struggle to identify the dominant sound in noisy environments. This gap in robustness limits the practical deployment of such systems in real-world urban settings, where noise levels are unpredictable and variable. Here, we introduce Smoothed Pseudo-Wigner–Ville Distribution-based MFCC (SPWVD-MFCC), a novel feature that merges SPWVD’s high time–frequency resolution with MFCC’s human-like auditory sensitivity. We further propose a dual-stream ResNet50-CNN-LSTM architecture to classify these features. Comprehensive experiments conducted on UrbanSound8K, UrbanSoundPlus, and DCASE2016 datasets demonstrate that the proposed SPWVD-MFCC significantly improves classification accuracy in noisy conditions, with an enhancement of up to 37.2% over traditional STFT-based methods and better robustness than existing approaches. These results indicate that the proposed approach addresses a critical gap in urban sound classification by providing enhanced robustness in low-SNR environments. This advancement improves the reliability of urban noise monitoring systems and contributes to the broader goal of creating healthier urban living environments by enabling more effective noise-control strategies.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"53 2","pages":"253 - 268"},"PeriodicalIF":1.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40857-025-00350-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0