Article
Chemistry, Multidisciplinary
Shahin Sohrabi, Amadeu Segura Torres, Ester Cierco Molins, Alessandro Perazzolo, Giuseppe Bizzarro, Pere Vicenc Rodriguez Sorribes
Summary: This study focuses on computing structure-borne noise levels within the cabin of a tiltrotor aircraft. The results show a good agreement between ATPA and SEA methods at high frequencies, but adjustments or modifications to the SEA model are necessary at low frequencies.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Aerospace
Vladimir Lavrov, Petr Moshkov, Dmitry Strelets
Summary: This study presents the results of in-flight experiments conducted on the RRJ-95NEW-100 prototype aircraft to understand the structure of the sound field in the cabin and pressure fluctuation fields on its fuselage surface. Wall pressure fluctuation spectrums were obtained for different zones of measuring windows during cruising flight. The impact of the jet on pressure fluctuation levels in the tail fuselage was also considered. The main noise sources in the cabin during cruising flight were found to be turbulent boundary layer noise on the fuselage surface and the air conditioning system, with their contribution varying along the length of the cabin.
Article
Engineering, Multidisciplinary
G. M. Szymanski, W. Misztal, M. Orczyk, P. Komorski
Summary: The researchers proposed to develop a model that can analyze the sound frequency structure in airport nearby areas, and tested its feasibility by conducting noise measurements during aircraft takeoffs. The model, focusing on the distance function, performed well with statistically verified high efficiency.
Article
Chemistry, Multidisciplinary
Songjune Lee, Sang-heon Lee, Cheolung Cheong
Summary: In this study, a high-fidelity numerical methodology is developed to accurately predict and analyze the interior transmitted noise due to external flow disturbance. The results show that the compressible pressure field contributes more to the interior noise in high-frequency bands.
APPLIED SCIENCES-BASEL
(2022)
Article
Public, Environmental & Occupational Health
Ayodele Adekunle Faiyetole, Johnson Tanpinu Sivowaku
Summary: - The study found that the impact of aircraft noise on participants is influenced by distance, educational attainment, and duration of exposure. Particularly, there is a significant risk for psychosocial health issues such as migraines. It is recommended that authorities and residents in airport environs take noise mitigation and coping strategies to reduce the negative impacts.
JOURNAL OF TRANSPORT & HEALTH
(2021)
Article
Engineering, Environmental
Xiaolei Yue, Zhongwen Yue, Yifei Yan, Yang Li
Summary: Studying effective methods for obtaining in situ rock mechanics properties in geotechnical engineering is highly significant. The development of digital drilling technology has provided additional approaches for predicting rock mechanical properties. This study utilized a self-established digital drilling test system to conduct experiments and demonstrated the predictability of rock compressive strength using borehole sound level combined with drilling parameters. The results indicate a strong correlation between borehole sound pressure level, rock compressive strength, and drilling parameters, enhancing advanced measurement techniques in drilling.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Chemistry, Physical
Feng Lai, Zhiyong Huang, Feng Guo
Summary: This study investigated the impact of different factors on the noise reduction of macroporous OGFC pavement, with results showing that OGFC pavement with high porosity has better noise reduction effect. As the effect of wheels increases and the depth of the road structure decreases, the noise reduction effect of OGFC decreases.
Article
Engineering, Aerospace
Ana Vieira, Mirjam Snellen, Dick G. Simons
Summary: The reduction of aircraft noise over the past decades has highlighted the importance of signal characteristics in determining annoyance levels, with frequency content and tonal components playing a significant role. Sound quality metrics such as loudness, roughness, sharpness, and tonality are crucial tools in characterizing sound. Experimental measurements of landing and takeoff aircraft have been used to investigate the variability of sound quality metrics across different aircraft types and within the same aircraft, as well as potential correlations with airframe, engines, and operational conditions.
Article
Acoustics
Kun Qian, Zhichao Hou
Summary: An intelligent evaluation method for the interior sound quality of electric vehicles (EVs) was designed using intelligent algorithms and artificial neural networks. The model accurately evaluates the SQ of EVs and serves as a convenient and effective tool for the acoustic design of EVs, based on subjective and objective evaluations of the SQ.
Article
Thermodynamics
Dorota Czopek, Dominik Grybos, Jacek Leszczynski, Jerzy Wiciak
Summary: This study proposes a new approach to identify energy losses in compressed air systems based on acoustic energy emission, establishes its validity through laboratory experiments, and suggests that acoustic monitoring is essential for diagnosing leaks in CASs.
Article
Acoustics
Yong Chen, Ming Wu, Ling Lu, Xing Fang, Jun Yang
Summary: A microphone array is utilized to enhance the target signal and suppress non-target interference when measuring the SPL of a target noise source in an outdoor environment. A real-time calibration method is introduced to compensate for the SPL difference caused by the mismatch in a MEMS microphone array. The method has been experimentally verified and shown to provide accurate and robust SPL calibration.
Article
Acoustics
Timothy Van Renterghem, Pieter Thomas, Luc Dekoninck, Dick Botteldooren
Summary: This intervention study focused on using a mobile measurement procedure to analyze the noise mitigation effectiveness of a complex shaped berm near a highway. The results showed that environmental noise exposure and mitigation measures are highly dependent on spatial factors, and practical constraints during implementation can greatly impact final efficiency. Maps based on mobile measurements were found to be useful for spatial planners in indicating the consequences of deviating from acoustically optimized plans.
Article
Acoustics
Joos Vos, Mark M. J. Houben
Summary: In this laboratory study, the indoor annoyance caused by aircraft takeoff noise on the runway was investigated. The study found that the annoyance increased with sound level, but was not affected by source type, gender, or age. By including the difference between outdoor C-weighted and A-weighted levels as a predictor, the study achieved a high explained variance of 98% in the mean indoor annoyance ratings.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Chemistry, Multidisciplinary
Kun Qian, Zhichao Hou, Jie Liang, Ruixue Liu, Dengke Sun
Summary: This paper proposes the use of objective psychoacoustic parameters as evaluation indexes for interior PEV noise, and designs a virtual interior SQ synthesis model based on Transfer path analysis (TPA) and transfer path synthesis (TPS). By combining experimentation and simulation, each noise component contribution in a PEV is demonstrated through new SQ separation technology. The accuracy of the prediction model is verified through simulation and experimental comparison studies, providing effective reference and new ideas for the development of interior SQ in PEVs.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Aerospace
Oleksandr Zaporozhets, Larisa Levchenko
Summary: Aircraft performance, noise database, operational weights, and procedures all have significant impacts on the assessment of noise exposure contour maps in real atmosphere conditions. Current recommendations allow defining flight profiles through balanced motion equations, but differences between measured and calculated sound levels still exist, especially in single flight noise events. Statistical data have been collected to understand and potentially use these differences in calculations. Additionally, real meteorological parameters always provide heterogeneous atmospheric conditions which may lead to inaccuracies in sound level calculations based on standard assumptions.
Article
Engineering, Mechanical
A. Casaburo, G. Petrone, V Meruane, F. Franco, S. De Rosa
Summary: The use of similitude theory in this study goes beyond predicting prototype dynamic responses, instead supporting and validating experimental measurements affected by noise. Through analyzing Aluminium Foam Sandwich (AFS) plates with Digital Image Correlation (DIC) cameras and applying the SAMSARA similitude method, researchers were able to demonstrate the reliability of measurements when spatial patterns in resonance were recognizable. Similitude methods serve as a valuable tool in determining the quality of measurements and should not be overlooked in analyzing noisy data.
EXPERIMENTAL TECHNIQUES
(2022)
Article
Engineering, Mechanical
G. Mazzeo, M. N. Ichchou, G. Petrone, O. Bareille, S. De Rosa, F. Franco
Summary: This study focuses on evaluating the decoupling between a test structure and its support in a wind tunnel facility using simplified models. It proposes design rules and investigates a simplified test-case, leading to promising results despite some being expected.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Mechanical
Alessandro Casaburo, Giuseppe Petrone, Viviana Meruane, Francesco Franco, Sergio De Rosa
Summary: Similitude theory was introduced in the last century, allowing engineers to design scaled versions of structures using similitude methods. While traditional laws may fail in predicting dynamic behavior when similitude is distorted, artificial neural networks have proven to be robust in predicting response characteristics and model identification.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Alessandro Casaburo, Dario Magliacano, Giuseppe Petrone, Francesco Franco, Sergio De Rosa
Summary: The research focuses on the vibroacoustics of periodic media and aims to develop tools for design and characterization. Numerical tests and different models are used to derive design guidelines, and machine learning algorithms are implemented for obtaining results.
APPLIED SCIENCES-BASEL
(2022)
Article
Acoustics
G. Mazzeo, M. Ichchou, G. Petrone, O. Bareille, S. De Rosa, F. Franco
Summary: In the field of transportation engineering, wind tunnels remain the best option for analyzing structural vibration and emitted noise. However, due to limitations and discrepancies among wind tunnel facilities, researchers have developed a numerical method called PEDEM to simulate the experimental conditions and study the structural response of panels subjected to turbulent boundary layer excitation.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Acoustics
Giuseppe Catapane, Giuseppe Petrone, Olivier Robin, Kevin Verdiere
Summary: To reduce space requirement, quarter wavelength resonators are coiled into spiral shape resembling a flat cylinder. Practical implementation involves 3D printing, laser cutting, and machining. Numerical simulations and impedance tube measurements are compared for normal incident plane wave excitation, evaluating the effect of inlet diameter, internal wall thickness, overall height, and constitutive material. 3D printing is used to produce samples with the optimal configuration, which are then tested in a small reverberation chamber under diffuse acoustic field excitation alone and in combination with a glass wool layer. The results show that coiled quarter wavelength resonators provide significant sound absorption at their lowest resonance frequency even with a much smaller size compared to the acoustic wavelength. (c) 2023 Elsevier Ltd. All rights reserved.
Article
Engineering, Electrical & Electronic
Sabrina Calvi, Laura Basirico, Sara M. Carturan, Ilaria Fratelli, Antonio Valletta, Alberto Aloisio, Stefania De Rosa, Felix Pino, Marcello Campajola, Andrea Ciavatti, Luca Tortora, Matteo Rapisarda, Sandra Moretto, Matteo Verdi, Stefano Bertoldo, Olivia Cesarini, Paolo Di Meo, Massimo Chiari, Francesco Tommasino, Ettore Sarnelli, Luigi Mariucci, Paolo Branchini, Alberto Quaranta, Beatrice Fraboni
Summary: This article presents a flexible, fully organic detector for proton beams. The detector operates in the indirect mode and consists of a polysiloxane-based scintillating layer coupled to an organic phototransistor. It demonstrates mechanical flexibility and low power operation with a limit of detection of 0.026 Gy min(-1). A kinetic model is proposed to accurately reproduce the dynamic response of the device under irradiation. This proton detector shows promise as a real-time particle detection tool for various applications, including experimental scientific research and theranostics.
NPJ FLEXIBLE ELECTRONICS
(2023)
Article
Acoustics
M. Pisano, E. Turco, G. Petrone, P. Gardonio, S. De Rosa
Summary: This paper presents a case study on the effects of electromagnetic tuneable vibration absorbers on an aircraft fuselage structure. It investigates the control of both tonal and broadband disturbances with different sizes and numbers of absorbers. The study shows that arrangements with many small-scale units produce larger vibration control effects, but downsizing may shift the operation frequency range and require larger inductors for tuning.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Acoustics
Sina Soleimanian, Giuseppe Petrone, Francesco Franco, Sergio De Rosa, Przemyslaw Kolakowski
Summary: A novel semi-active vibration control technique for mechanical transmission systems is proposed in this study. The adaptive stiffness and damping properties of metal rubber (MR) play a key role in tuning the vibrational system eigenmodes. The study investigates the effect of MR material's adaptive properties on structural response and designs an MR-based semi-active vibration controller for industrial application.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Materials Science, Multidisciplinary
Dario Magliacano, Giuseppe Catapane, Giuseppe Petrone, Kevin Verdiere, Olivier Robin
Summary: The aim of this study is to investigate the effect of embedding periodic patterns in porous materials to passively enhance their acoustic performance. The focus is on improving sound transmission loss in classical aeronautical soundproofing packages. Numerical models of acoustic packages with periodic patterns were implemented using the finite element method and the Transfer Matrix Method. Experimental testing of some proposed configurations was conducted for comparison and validation of numerical results. Various configurations of inclusions were numerically studied, including hollow cylindrical inclusions, half-cut hollow cylindrical inclusions, and cylindrical Helmholtz resonators, to evaluate the improvements in transmission loss under plane wave excitation with different incidence angles. The main contributions of this work include experimental validation of proposed acoustic meta-materials previously only studied numerically, and consideration of the effect of including a periodic pattern of Helmholtz resonators in the foam core. Numerical results were also evaluated for different incidence angles of an exciting acoustic plane wave.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Acoustics
Giuseppe Catapane, Giuseppe Petrone, Olivier Robin
Summary: Micro-perforated panel sound absorbers have been widely used in noise control applications. This work proposes a hybrid sound absorber that combines a micro-perforated panel and a coiled quarter wavelength tube. The series and parallel configurations of these two systems are studied from analytical, numerical, and experimental perspectives. The advantages and limitations of the configurations are discussed, and the reproducibility of the hybrid absorber in parallel configuration is confirmed.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Proceedings Paper
Engineering, Civil
Mariarosaria Milo, Giuseppe Petrone, Alessandro Casaburo, Sergio De Rosa, Renato Brancati, Ernesto Rocca
Summary: This paper investigates the potential of an acoustic camera coupled with a machine learning algorithm to detect anomalies in an operating gear box. Experimental data was collected under various operating conditions, and a Convolution Neural Network (CNN) was trained to classify the sound images. The results show promising accuracy of 95%, indicating the suitability of this technique for non-intrusive monitoring.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 3
(2023)
Article
Engineering, Aerospace
Andre F. P. Ribeiro, Carlos Ferreira, Damiano Casalino
Summary: This study compares a filament-based free wake panel method to experimental and validated numerical data in order to simulate propeller slipstreams and their interaction with aircraft components. The results show that the free wake panel method is able to successfully capture the slipstream deformation and shearing, making it a useful tool for propeller-wing interaction in preliminary aircraft design.
AEROSPACE SCIENCE AND TECHNOLOGY
(2024)
