Acoustics Australia最新文献

Traffic Noise Affects Brazilian Mundo Novo Treefrog Calling Behavior 交通噪声影响巴西 Mundo Novo 树蛙的鸣叫行为

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2024-08-27 DOI: 10.1007/s40857-024-00331-1

Rógger L. T. Antunes, Márcio Borges-Martins, Giorgia Guagliumi, Valentina Zaffaroni-Caorsi

{"title":"Traffic Noise Affects Brazilian Mundo Novo Treefrog Calling Behavior","authors":"Rógger L. T. Antunes, Márcio Borges-Martins, Giorgia Guagliumi, Valentina Zaffaroni-Caorsi","doi":"10.1007/s40857-024-00331-1","DOIUrl":"https://doi.org/10.1007/s40857-024-00331-1","url":null,"abstract":"Anthropogenic disturbance, including noise, is a major cause of biodiversity decline worldwide. Especially in anurans, the effect of noise pollution is known to have major consequences on their reproduction since acoustic communication is an essential part of this process. In this study, we tested the effect of three levels of traffic noise (55 dB, 65 dB, and 75 dB) corresponding to three different distances from the road (200, 100, and 50 m, respectively) on the Brazilian Mundo Novo treefrog (Boana marginata). The results of the playback experiments showed an effect on call type B. More specifically, there was a decrease in the advertisement call rate, a reduction in the number of pulses, and a lengthening of the interval between pulses, particularly at 65 dB. These findings suggest that at distances of up to 100 m, the masking effect significantly influences acoustic communication on the species. However, a 55 dB stimulus—equal to 200 m from the road edge—did not change the call in this species, suggesting a minimal distance to implement noise-inflicting infrastructures. We recommend that new studies adopt sampling methods from this distance to refine the threshold of the traffic noise effect.","PeriodicalId":50909,"journal":{"name":"Acoustics Australia","volume":"24 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223885","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}

引用次数: 0

Comparison of Small Rotor Tonal and Random Noise Decomposition Methods 小转子音调和随机噪声分解方法的比较

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2024-08-23 DOI: 10.1007/s40857-024-00333-z

Justin Malkki, Yendrew Yauwenas, Con Doolan, Danielle Moreau

引用次数: 0

Statistical Properties of Train Vibration Spectra for Ground-Borne Noise Assessments 用于地面噪声评估的列车振动频谱统计特性

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2024-08-23 DOI: 10.1007/s40857-024-00334-y

Dominik Duschlbauer, Michael Allan, James Nelson

{"title":"Statistical Properties of Train Vibration Spectra for Ground-Borne Noise Assessments","authors":"Dominik Duschlbauer, Michael Allan, James Nelson","doi":"10.1007/s40857-024-00334-y","DOIUrl":"https://doi.org/10.1007/s40857-024-00334-y","url":null,"abstract":"The train vibration levels at a receiver are primarily governed by the trackform and its offset from the tracks. For a given trackform and offset, however, there can still be a wide variation in vibration generated by trains depending on the wheel and rail surface conditions, composition of the fleet and train speeds. In Australia, policies for the assessment of ground-borne noise and vibration are generally focused on the 95th percentile of train pass-bys. The use of this statistical descriptor is equivalent to a 5% exceedance level, i.e. vibration from one in twenty trains can be expected to be greater. This paper analyses four vibration datasets measured in Australasia. Three sets were measured on busy metropolitan train networks with direct fixation tracks in tunnels, and one dataset was measured on a ballasted surface track. The study focuses on the calculation of 95th percentiles and the effect of dataset size on the resulting 95th percentile vibration levels. Statistical error bands are calculated as a function of the number of consecutive pass-bys used in the dataset which allows for estimating the potential risks associated with working with small datasets. The effect of different approaches for calculating the percentiles is also discussed.","PeriodicalId":50909,"journal":{"name":"Acoustics Australia","volume":"32 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181806","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}

引用次数: 0

Numerical Investigation on Aerodynamic Noise Source Identification and Far-Field Noise Characteristics of the High-Speed Train Bogie Region 高速列车转向架区域空气动力噪声源识别和远场噪声特性的数值研究

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2024-08-14 DOI: 10.1007/s40857-024-00332-0

Jiawei Shi, Jiye Zhang, Tian Li

{"title":"Numerical Investigation on Aerodynamic Noise Source Identification and Far-Field Noise Characteristics of the High-Speed Train Bogie Region","authors":"Jiawei Shi, Jiye Zhang, Tian Li","doi":"10.1007/s40857-024-00332-0","DOIUrl":"https://doi.org/10.1007/s40857-024-00332-0","url":null,"abstract":"The bogie region is one of the most important aerodynamic noise sources of high-speed trains. A thorough understanding of the generation mechanism and characteristics of bogie aerodynamic noise is the prerequisite for effective implementation of noise control measures. In this study, a delayed detached eddy simulation (DDES) is performed to solve the unsteady flow field around the bogie region, and an aerodynamic noise source identification method based on the integral solution of the Ffowcs Williams-Hawkings (FW-H) equation is adopted to determine the dipole and quadrupole sources distribution in the bogie region. The identification results of the two types of sources provide different understandings of the noise generation mechanism of the bogie region but determine the same flow structures closely associated with the bogie aerodynamic noise, which are the shear vortex structures formed at the rear edge of the cowcatcher and the front side edges of the bogie cavity. The flow field data obtained by DDES simulation is also used as input for the FW-H solver to calculate far-field noise, and the source contribution, spectrum characteristics and directivity of the far-field noise are analyzed. The results show that at a speed of 350 km/h, the aerodynamic noise in the bogie region is still dominated by dipole sources, and the contributions of the bogie itself and the bogie cavity to far-field noise are equally important despite the significant differences in their radiation characteristics.","PeriodicalId":50909,"journal":{"name":"Acoustics Australia","volume":"117 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181807","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}

引用次数: 0

Numerical Simulation and Experimental Study of Aerodynamic Noise Reduction of Elbow Based on Leading- and Trailing-Edge Serrated Guide Vanes 基于前缘和后缘锯齿导叶的弯头气动降噪数值模拟与实验研究

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2024-08-12 DOI: 10.1007/s40857-024-00330-2

Lili Ye, Xianzhong Wang, Weiguo Wu, Haoran Ma, Weijia Feng

引用次数: 0

Assessing Noise from Light Rail Vehicles Idling at Termini in NSW, Australia 评估澳大利亚新南威尔士州轻轨车辆在终点站空转时产生的噪声

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2024-06-18 DOI: 10.1007/s40857-024-00328-w

Aaron Miller, Briony Croft, Jordan McMahon

{"title":"Assessing Noise from Light Rail Vehicles Idling at Termini in NSW, Australia","authors":"Aaron Miller, Briony Croft, Jordan McMahon","doi":"10.1007/s40857-024-00328-w","DOIUrl":"https://doi.org/10.1007/s40857-024-00328-w","url":null,"abstract":"Light rail vehicles will often idle with their air conditioners running at terminus locations that may be located near sensitive receivers due to network constraints. This creates a pseudo-stationary noise source with similar level and characteristics to industrial air conditioners that can result in disturbance and complaints from nearby sensitive receivers. However, in practice in the state of New South Wales (NSW), Australia, this pseudo-stationary noise source is commonly assessed against airborne noise criteria for transportation noise. This is due to the Conditions of Approval on the Sydney Inner West Light Rail Extension project explicitly delineating noise produced by light rail vehicles from other sources. This interpretation has been applied on all subsequent light rail projects in NSW, which have assessed this noise source at termini against the Rail Infrastructure Noise Guideline (RING) requirements. The Noise Policy for Industry (NPfI) has been applied to other noise sources on these projects, specifically fixed equipment at stops and all noise sources at stabling facilities (including light rail vehicle air conditioning noise and traffic movements within the boundary of the facility). This paper examines the policy overlap between the RING and the NPfI that makes both documents potentially applicable to noise from light rail air conditioners when idling at termini, depending on interpretation and specific project conditions of approval. It also presents a hypothetical assessment of typical light rail activities near termini against both the RING and NPfI, to demonstrate the potential differences in project outcomes between the applications of the two documents. An example of a compromise that acknowledges the pseudo-stationary nature of the noise source as well as the benefits that public infrastructure provides relative to industrial facilities is also suggested, in lieu of a separate threshold or policy for this very specific circumstance.","PeriodicalId":50909,"journal":{"name":"Acoustics Australia","volume":"56 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532323","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}

引用次数: 0

The Practicality of Using Generic Acoustical Equipment in Impedance Tube Design 在阻抗管设计中使用通用声学设备的实用性

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2024-05-31 DOI: 10.1007/s40857-024-00326-y

Mohammad Barzegar, Clive E. Davies

引用次数: 0

News Item 新闻

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-03-18 DOI: 10.1007/BF00032094

Dongdong Lu, Xiangyang Zeng, Xiaochao Guo, Aishwarya Banerjee

引用次数: 0

Aerial and underwater sound of unmanned aerial vehicles (UAV) 无人驾驶飞行器(UAV)的空中和水下声音