Applied Acoustics最新文献

{"title":"The DeuteroNoise dataset: An open, calibrated, multi-basin resource for vessel noise and natural soundscapes in European coastal waters","authors":"Ignasi Nou-Plana ,&nbsp;Adrian Teaca ,&nbsp;Giovanni Zambon ,&nbsp;Rosa Ma Alsina-Pagès","doi":"10.1016/j.apacoust.2026.111239","DOIUrl":"10.1016/j.apacoust.2026.111239","url":null,"abstract":"<div><div>Understanding underwater soundscapes is essential for assessing the impacts of maritime noise pollution on marine environments. Characterizing these soundscapes is crucial both for evaluating current noise impacts and for developing future mitigation strategies. Several datasets have been published focusing on the acoustic signatures of common vessel types; however, most remain restricted to a single location, are not fully open to the public, and lack scalable storage or dissemination tools. The DeuteroNoise Dataset addresses these gaps; an open-access corpus that pairs long-duration, calibrated hydrophone recordings with time-synchronised Automatic Identification System data to document coastal vessel noise and contrasting natural soundscapes at three European sites: the Catalan coast, the Venice Lagoon, and the western Black Sea. Six short-term fixed-station campaigns conducted since December 2023 have produced nearly 700 h of publicly available continuous audio with more than 11 h of labelled audio. Each recorded and identified event is correlated with the ship’s identity, position, and speed metadata; the dataset therefore spans cargo vessel traffic, workboats, leisure craft, and non-anthropogenic background sounds. Vessel types are categorized and linked to their acoustic signatures, facilitating analyses of soundscape dynamics and ecological impact. Built on PostgreSQL with a FastAPI backend, and served through an interactive web interface, the dataset offers a scalable platform for large-scale retrieval and exploration. By integrating calibrated, multi-basin recordings with vessel metadata in an openly accessible, scalable framework. The DeuteroNoise Dataset represents the first resource of its kind in Europe, enabling robust cross-regional comparisons, supporting the development of AI-based classification models, advancing ecological research on anthropogenic noise, and setting a new benchmark for underwater soundscape monitoring worldwide.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111239"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Perceptual evaluation of an auralization model for pulse width modulation noise","authors":"Salomé Wanty ,&nbsp;Etienne Parizet ,&nbsp;Nicolas Totaro ,&nbsp;Martin Glesser","doi":"10.1016/j.apacoust.2026.111235","DOIUrl":"10.1016/j.apacoust.2026.111235","url":null,"abstract":"<div><div>Electric motors have become a part of our daily lives, making the question of their noise essential for our acoustic comfort. The sound they emit is often described as tonal or whistling due to the presence of many harmonics, one source of which is a power supply technique called pulse width modulation (PWM). During the design process, auralization models can be used to evaluate the effect of PWM harmonics on sound quality. Engineering-grade models, which are based on simplifying assumptions, are used in the early stages of design when little input data is available. With these models, a direct perceptual comparison between measured and simulated sounds would inevitably reveal significant differences. However, if the model can reliably predict the perceptual sound space, it can be a valuable tool for assessing sound quality. This paper presents a methodology to evaluate the capability of a simplified engineering model to simulate the main attributes of PWM noise. To this end, the authors implemented an auralization model to synthesize the noise emitted by an electric motor from its supply signals. Some sound stimuli were collected from measurements and simulations to conduct a perceptual experiment. The measured and simulated sounds were evaluated separately within two sets of stimuli. The experiment included similarity and pleasantness evaluations. Comparing the results obtained by Individual Difference Scaling (INDSCAL) showed great coherence between the two sound sets, suggesting that the simulated stimuli were evaluated similarly to the measured stimuli. Pleasantness ratings yielded the same result. Therefore, the auralization model appears to reliably reproduce the main sound dimensions underlying the perception of PWM noise.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111235"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Investigation on the acoustic interaction between over-the-stator liner and stator blade row","authors":"Chuanyang Liu ,&nbsp;Xiaoyu Wang ,&nbsp;Guangyu Zhang ,&nbsp;Zhiliang Hong ,&nbsp;Xiaofeng Sun","doi":"10.1016/j.apacoust.2026.111232","DOIUrl":"10.1016/j.apacoust.2026.111232","url":null,"abstract":"<div><div>To investigate the noise reduction characteristics of a liner located at the blade tip on incident sound waves, this study combines experimental and numerical methods to explore the acoustic interaction mechanism between incident sound waves, the over-the-stator liner (OTSL), and the blade row under flow-free conditions. Experimental comparisons among the OTSL (with blade row), the liner only (no blade row), and the blade row only (with a hard wall casing) configurations reveal that the blade row significantly affects the liner’s noise reduction performance, and the OTSL exhibits effective sound absorption for both transmitted and scattered sound waves. Overall, the noise reduction effectiveness of the OTSL is superior to that of the liner only. Numerical analyses of acoustic particle velocity on the liner surface and pressure fluctuations on the blade surface confirm that the interaction between the OTSL and the blade row influences the liner’s dissipative characteristics and the blade row’s scattering behavior. Further investigations indicate that this interaction is correlated with the sound wave propagation direction, frequency, blade angle, and the sound absorption performance of the liner itself.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111232"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Amplitude modulation of scattered acoustic waves by ULF oscillatory flow produced by submerged bodies: An experimental study","authors":"Ruixin Nie ,&nbsp;Kaiqi Zhao ,&nbsp;Bin Wang ,&nbsp;Jun Fan ,&nbsp;Yehao Shi","doi":"10.1016/j.apacoust.2026.111223","DOIUrl":"10.1016/j.apacoust.2026.111223","url":null,"abstract":"<div><div>Sound waves propagating through media with local fluctuations experience phase and amplitude perturbations that carry valuable information about the medium. This principle offers potential for indirectly detecting moving submerged objects, as flow-induced acoustic modulations can reveal their motion characteristics. This study experimentally investigates the Amplitude Modulation (AM) of acoustic waves induced by Ultra-Low-Frequency (ULF) oscillatory flows generated by moving submerged bodies. Controlled tank experiments were conducted to examine the influence of oscillation amplitude, frequency, and movement pattern on single-frequency acoustic signals. Experimental results confirmed the occurrence of AM, with the acoustic signal acting as the carrier and the oscillatory flow as the modulation signal. It was observed that the modulation depth systematically increases with higher oscillation amplitudes and frequencies, demonstrating the pronounced influence of oscillatory flows on acoustic wave propagation. To gain deeper insights into the modulation mechanism, a theoretical framework based on the adiabatic normal mode approximation and perturbation methods was developed to interpret the observed phenomena, treating flow-induced sound speed variations as the primary mechanism for the observed modulation. The agreement between theoretical predictions and experimental observations supports the model’s ability to predict modulation characteristics based on hydrodynamic parameters. This study suggests the potential of using flow-induced acoustic modulations from moving objects as an indirect detection method, providing a foundation for future applications in underwater target detection and tracking.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111223"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145941253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"A simplified active noise control system with remote microphone technique based on blind source separation","authors":"Tian Zhang,&nbsp;Ning Han,&nbsp;Zhehua Duan","doi":"10.1016/j.apacoust.2026.111221","DOIUrl":"10.1016/j.apacoust.2026.111221","url":null,"abstract":"<div><div>Remote microphone technique is designed to solve the problem of physical microphones being inconvenient to install in a zone of quiet requiring noise attenuation. However, a typical remote microphone technique based system necessitates a sufficient number of monitoring microphones, generally no fewer than the number of noise sources, to ensure optimal noise reduction performance. Such requirements may lead to increased equipment costs and significant computational demands. In this paper, we develop a methodological approach to simplify the system based on blind source separation and remote microphone technique, aiming to reduce the number of microphones within the system. The main approach operates in three steps. First, the correlation of the sound field is analyzed to determine the microphone configuration. Second, the observation filter is modeled with monitoring microphone signals de-correlated by the blind source separation method. Third, the virtual signal estimated using the observation filter is employed in the active noise control system. Experimental results verify the superiority of the proposed algorithm in computational complexity. Furthermore, results also show that under various noise conditions, the proposed algorithm can achieve similar noise reduction performance as traditional systems while reducing the number of microphones required.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111221"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145941254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Proactive blockage detection in sewer pipes using paired acoustic sensors: An experimental study","authors":"Thi Hai Duong Ninh,&nbsp;Wei Zeng,&nbsp;Martin Francis Lambert,&nbsp;Nhu Cuong Do,&nbsp;Chengcheng Yin","doi":"10.1016/j.apacoust.2026.111244","DOIUrl":"10.1016/j.apacoust.2026.111244","url":null,"abstract":"<div><div>Sewer overflows due to blockages are significant challenges for water utilities worldwide, as these events pose substantial risks of disruption and contamination to society, the economy, and the environment. Accurately detecting blockages in sewer systems is essential to mitigate such incidents. This paper investigates the use of paired acoustic sensors in combination with a paired-impulse response function (paired-IRF) technique to detect, locate, and estimate sewer blockages, helping to prevent sewer overflow risks. Laboratory tests were conducted on both clean and blocked pipes with varying blockage types and severities. The acoustic responses of these pipes were analysed to distinguish between unobstructed and obstructed conditions. The paired IRF extracted was then applied to identify blockage locations and estimate blockage sizes. The presence of paired spikes in the paired-IRF trace serves as clear evidence of blockages within the tested sewer pipe, including those caused by tree root and solid materials. The technique accurately identified both the location and size of blockages, showing strong agreement with actual conditions observed during experiments. These findings express that the acoustic-based paired-IRF approach is a reliable method for blockage detection in sewer systems, enabling water utilities to take informed and timely actions before issues lead to environmental or public health impacts.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111244"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Spatial correlation of non-uniform seafloor vibrations under a marine isotropic noise field","authors":"Bowen Dong,&nbsp;Haifeng Zhang,&nbsp;Fengyuan Yang","doi":"10.1016/j.apacoust.2026.111236","DOIUrl":"10.1016/j.apacoust.2026.111236","url":null,"abstract":"<div><div>This paper addresses the spatial correlation modeling of seafloor sediment–water interface vibrations within an isotropic noise field. The novelty of this work lies in revealing the role of non-uniform waves in shaping the spatial correlation of interface vibrations, establishing a theoretical framework for the biphasic half-space interface under isotropic noise, and deriving integral expressions for the auto- and cross-correlations of interface vibrations. The correlation behavior of sediment–water interface vibrations is analyzed, considering various influencing factors, including the properties of the sediment layer and the noise frequency. The study demonstrates that non-uniform waves at the interface significantly influence the spatial cross-correlation of vibrations. These waves induce spatial correlation among the originally uncorrelated tri-axial vibrations of the sediment–water interface.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111236"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Three-dimensional microphone array for the reconstruction of compact dipole aeroacoustic sources with spatially varying orientation","authors":"Louise Chiocchetti ,&nbsp;David Marx ,&nbsp;Vincent Valeau ,&nbsp;François Ollivier ,&nbsp;Régis Marchiano","doi":"10.1016/j.apacoust.2026.111243","DOIUrl":"10.1016/j.apacoust.2026.111243","url":null,"abstract":"<div><div>This work investigates, using a microphone array, the localization of aeroacoustic sources resulting from the interaction of a flow with rods. In similar investigations in the literature, arrays often have a planar geometry and the spatial region in which acoustic sources are searched is a plane parallel to that of the array. However, the sources are not always distributed in such a plane. Moreover, aeroacoustic sources resulting from flow-obstacle interaction are often dipoles, and for some complex geometries, the dipoles’ orientation can vary in space, such as for curved obstacles or arrangements of rods with different orientations. In order to identify such dipoles, this work uses a three-dimensional array composed of four flat arrays, forming a tunnel of 1024 microphones around the open vein of an anechoic wind tunnel. Microphone signals are processed by an inverse beamforming technique to identify equivalent dipole sources producing the measured sound field at the array, using classical Tikhonov regularization. Taking advantage of the acoustic compactness of the cross-section of the rods located in the flow, the dipoles are sought along the axis of the rods, with a spacing of the order of the vortex shedding coherence length. The technique does not require any prior assumption on dipole orientation. Results from simulated or experimental data are presented to assess the effectiveness of the method, in the cases of a rectilinear rod and a bent rod forming a ring.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111243"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"A ventilated silencer based on rainbow trapping structure for broadband noise attenuation","authors":"Yunwei Chen ,&nbsp;Xiaomei Xu ,&nbsp;Kangfan Yu ,&nbsp;Qidi Fu ,&nbsp;Xiaofei Du ,&nbsp;Jianrun Zhang","doi":"10.1016/j.apacoust.2026.111240","DOIUrl":"10.1016/j.apacoust.2026.111240","url":null,"abstract":"<div><div>Fan noise propagating within ducts is typically broadband in nature. Conventional silencers often fail to achieve effective broadband noise insulation, presenting a persistent challenge in engineering applications. The rainbow trapping effect offers an innovative solution to this problem. This paper proposes a ventilated silencer based on the rainbow trapping effect, which provides broadband capability of noise attenuation without altering the duct inner diameter. The original rainbow trapping structure is transformed into a fan shaped configuration, mounted by circular arrays and filled with porous materials to form a silencer suitable for duct applications. To analyze the performance of this silencer, a comprehensive finite element model is developed, which is validated through impedance tube experiments. The results reveal that sound waves with different frequencies could be captured by branch cavities with varying depths, and the acoustic energy will be subsequently dissipated by the filled porous materials. Both impedance tube experimental and simulation results demonstrate the broadband performance of the proposed silencer, specifically achieving a sound transmission loss exceeding 10 dB above 257 Hz, representing 90% acoustic energy insulation. Fan tests demonstrated that the average overall sound pressure level is reduced by 4.8 dB after installing the silencer. Parametric analysis indicates that this silencer can achieve excellent broadband performance without requiring complicated design and manufacturing processes. This work presents a promising approach for duct and fan noise control applications.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111240"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146039317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"An empirical diffusion coefficient function for the acoustic diffusion equation model in long rooms","authors":"Ilaria Fichera,&nbsp;Cédric Van hoorickx,&nbsp;Maarten Hornikx","doi":"10.1016/j.apacoust.2026.111234","DOIUrl":"10.1016/j.apacoust.2026.111234","url":null,"abstract":"<div><div>In the diffusion equation model, the diffusion coefficient quantifies the relationship between the sound intensity and the gradient of the sound energy density. It is a crucial factor that affects the diffusion equation model, mostly for non-proportionate rooms. Previous work has indicated that this parameter varies spatially based on the rooms’ dimensions, the absorption coefficient, and the distance between source and receiver positions. In this paper, the spatially dependent diffusion coefficient is obtained by optimizing a distance-dependent function for the diffusion coefficient using reference results obtained from the radiosity method. The estimated diffusion coefficient inside long rooms is also shown to depend on the source position. The empirical function for the diffusion coefficient for long rooms is established as a quadratic polynomial function and is applicable for elongated rooms with a constant absorption coefficient lower than 0.3 and a minimum cross section of 4 m².</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"246 ","pages":"Article 111234"},"PeriodicalIF":3.4,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}