bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of noise remote sensing to conquer loud vehicles in Amsterdam
Authors: PEETERS Bert , SCHOONEBEEK Carlo
Published: October 2024

Techniques for remote sensing of noise are rapidly evolving, allowing for automatic and unsupervised monitoring of individual noise events. In the H2020 project NEMO, noise remote sensing was developed and applied to detect individual loud vehicles in normal road or rail traffic. Potential
applications include urban vehicle access restrictions (UVAR) such as in low emission zones, based on real world emissions rather than type approval data. The city of Amsterdam is also experimenting with influencing driving behaviour and raising road user awareness to reduce the number of
high noise emitters. Amsterdam uses dynamic roadside signalling for this, which shows a message "too loud" to noise vehicles passing by. New tests are now performed with a more advanced acoustic camera to localize and track the individual vehicle, connected to license plate and speed
detectors. This paper describes how NEMO results are used to achieve an actual reduction of high emitters in Amsterdam. First results of experiments are presented along with technical challenges that need to be overcome. These challenges include reduction of measurement uncertainty as well
as uncertainty as to what vehicle a high noise event belongs to.
Noise optimization of hydraulic piston pump
Authors: CHEN Zhixiang
Published: October 2024

With the development of electrification, the internal combustion engine (ICE) is gradually replaced by the electric motor. Lack of the ICE noise occultation, the noise of hydraulic piston pump becomes prominent. It is significant to decrease the noise of hydraulic piston pump for improving
the driving comfort. The present study detailed investigates the simulation method for modal and noise calculation of the hydraulic piston pump. The noise prediction of hydraulic pump agrees well with measurements on the distribution of sound pressure vs. frequency. According to modal and
noise distribution characteristics, the housing structure of hydraulic piston pump has been optimized to shift the modal frequency and decrease the noise. The simulation data proves that optimized hydraulic pump housing has great potential to decrease the noise. Compared with the original
hydraulic pump housing, the sound pressure overall lever of optimized hydraulic piston pump is validated to decrease by 2-3dBA.
Robotic arm, 3D vision and geometric matching for an efficient implementation of inverse Patch Transfer Function method
Authors: TOTARO Nicolas , ROBIN Maxime , RASSEZ Jean , MALINGE Marc-Antoine
Published: October 2024

The inverse patch transfer function method was developed to reconstruct the acoustic fields (velocity, pressure, intensity) at the surface of a vibrating source with a complex geometry using the concept of a virtual acoustic domain. This method can be used to manage sources with complex
shapes in a non-anechoic acoustic environment, even in the presence of masking objects. However, this method is quite demanding experimentally as it requires a large number of measurement positions with good spatial positioning accuracy. This article presents a dedicated experimental platform
developed to simplify and automate the entire measurement process. First, a 3D camera placed on a robotic arm constructs a point cloud characterising the source and its environment. Using a geometric matching algorithm, the CAD of the object under test is detected in the cloud of points, enabling
the different coordinate systems (CAD, robot and physical part) to be matched. Secondly, the measurement points required to apply iPTF can be defined directly in the CAD and reproduced in near-real time on the test rig, regardless of the type of antenna used, providing an efficient means of
applying iPTF and opening the way to many advanced applications.
Comparative study of different programs for sound insulation calculations
Authors: HAGBERG Klas , BARD Delphine , NILSSON Erik
Published: October 2024

Engineering programs for calculating sound insulation in wooden buildings are a shortage, especially when it comes to wooden structures. There are some possibilities today to calculate field values using commercial programs following ISO 12354. However, detailed calculations for each
construction part are sometimes crucial to optimize correctly, specifically for CLT or wood beam structures since they are far more complex than traditional concrete structures. Now, some programs are available on the market to calculate sound insulation for CLT structures. StoraEnso offers
"Calculatis" online for free, and Marshall Day Acoustics provides "Insul 10". In short, the company Sonusoft will release a software called "Acoulatis". These three programs have slightly different approaches, and their capability to calculate various wall and
floor structures differs. Nevertheless, the different programs are all limited to walls or floors construction parts, e.g. the outcome is Rw and Ln,w including spectrum adaptation terms, e.g. junctions are not included. In this paper, a comparison is made using the three different programs,
including comparisons to measured values when available.
An investigation of the performances of asynchronous measurements methods
Authors: ITARE Nathan , CHARDON Gilles , PICHERAL José
Published: October 2024

In acoustical imaging and source localization, several methods for the exploitation of asynchronous array measurements have been proposed, based on covariance matrix completion, Bayesian estimation, fusion of beamforming maps, etc. The goal of asynchronous measurements is to reach the
performance of large and dense arrays, with reduced experimental effort, by moving an array of limited size between experiments, and fuse the obtained data to produce an estimation of the distribution of acoustical sources. In this study, we consider the performances that one can expect from
asynchronous measurements, and investigate the actual performances of several methods from the state of the art. In particular, the mean squared errors of the estimation of the position and power of an acoustical source are estimated using simulations and experimental measurements.
Separation of music signal spectrograms using copula models
Authors: MAMOUNI Nezha , LECLERE Quentin , ANTONI Jerome , LEIBA Raphaël
Published: October 2024

The focus of this paper is on utilizing a copula-based technique for separating music signals. In this method, copulas are utilized to model the dependency structure of the source components. The objective is to minimize the Kullback-Leibler divergence between the copula density of
the estimated source components and the copula density of the source components, which is assumed to be unknown. We give an application for the separation of stereo music recording using different copula models. We show through this application that by modeling the dependency between music
signals, we can gain insights into the underlying structure of music signals and also we can ameliorate the separation performance.
Higher-fidelity analysis of air source heat pump noise via scanning intensity measurement
Authors: BARTON Lucy , HARGREAVES Jonathan , TORIJA MARTINEZ Antonio , RADIVAN Max , ACUN Volkan , GRAETZER Simone , WONG-MCSWEENEY Daniel , COX Trevor , WADDINGTON David
Published: October 2024

The need to shift to reduce carbon emissions to hit Net Zero is currently driving plans for large scale rollouts of Air Source Heat Pumps (ASHPs), due to their increased thermal efficiency and lack of direct carbon emissions. Concern exists, however, over the potential environmental
noise impact that these units could generate. The noise generated by ASHPs is measured according to BS EN 12102-2:2019. This allows a choice of several laboratory test procedures for the acoustic part, but in each of these methods only overall sound power is measured. Such measurements are
crucial, but they cannot give insight into the directivity of the noise from the unit - as is required for accurate acoustic propagation modelling - and they cannot give diagnostic information that would aid improvements to designs, e.g., by showing which parts of an ASHP radiate the most
noise. This paper explores the benefits offered by scanning intensity measurement, here using a Microflown Scan and Paint 3D system. This can provide a map of active and reactive intensity around the unit - in addition to pressure and particle velocity - allowing noise from components and
directivity to be estimated. Advantages and challenges are discussed.
Assessing and mitigating environmental noise pollution: a case study of a metallurgy company
Authors: VIDOTI Marco , KLEIN Michael Edson , BENATTI Bruno , ISNARD Nicolas Jean Edouard
Published: October 2024

This study aims to analyze the environmental acoustic and vibrational scenario surrounding a metallurgy company, focusing on an industrial unit. Initially, assessments were conducted, including sound pressure measurements according to the ABNT NBR 10.151:2019 standard and internal procedures,
comparing the results with regional legal limits. The second analysis focused on particle vibration velocity peaks collected in June 2022, comparing them with the standards established by DD No. 215/2007/E of CETESB. Upon identifying nocturnal noise levels above the limit at two monitored
points, an additional step was taken. The internal noise of the main plant sources was characterized, creating noise and conflict maps with legislation. These maps assess noise in the inhabited areas surrounding the industry, identifying critical sources for exceeding limits. Conceptual acoustic
solutions were proposed, including the necessary attenuation to ensure that external noise from the factory complies with normative limits in the inhabited areas nearby.
Which acoustic dimensions could act as mediators between urban greenspace and human health?
Authors: HASELHOFF Timo , SCHUCK Moritz , LAWRENCE Bryce T. , FIEBIG André , MOEBUS Susanne
Published: October 2024

The beneficial effects of urban greenspace on human health and well-being are widely recognized, but the underlying mechanisms are incompletely understood. The acoustic environment (AE) is often proposed as a detrimental factor and emerging evidence suggests that it may also represent
a beneficial resource. If different dimensions of the AE were to represent a mediator between greenspace and human health, they would need to be associated with both. We present results investigating the first prerequisite: the associations between acoustic dimensions and urban greenspace.
We use audio recordings from SALVE, randomly sampled at 730 locations four times per year (n=2,746) in Bochum, Germany. The AE is quantified by 122 eco- and psychoacoustic indices, sound pressure levels and complex network measures. Greenspace is defined as the percentage of green area in
a 300 m-buffer around each recording location, grouped into quintiles. We apply dimensionality reduction and present descriptive statistics to analyze the associations between identified acoustic dimensions and urban green area. In addition to the "sound volume", we find that biophonic
sounds, the Acoustic Richness, the Impulsiveness, the Roughness, and the "acoustic dominance" show a consistently decreasing/increasing trend across the five quintiles of urban green area.
Numerical investigation on the strategy of separating burner-flame thermoacoustics
Authors: F. GANJI Hamed , KORNILOV Viktor , VAN OIJEN Jeroen , LOPEZ ARTEAGA Ines , DE GOEY Philip
Published: October 2024

Thermoacoustic instability in combustion systems is contingent upon the thermoacoustic properties of the burner when coupled with a flame. In instances where the burner is acoustically transparent, a straightforward approach involves the separation of the burner from its corresponding
flame. Acoustic velocity measurement at the upstream of the burner, in such cases, can be equated with the acoustic velocity at the downstream of the burner due to its transparency. However, when the burner possesses a complex geometry with inherent acoustic properties, this separation strategy
becomes pivotal. Near-field acoustics immediately following the burner may influence the effectiveness of this separation. Additionally, burners are typically characterized in the absence of a flame (cold condition), with a common assumption that the acoustic properties of the burner remain
unchanged in the presence of the flame (hot condition). This paper employs numerical simulations to scrutinize these assumptions and the separation strategy of the burner from the flame. Utilizing direct numerical simulation and an acoustic network approach, we compare the direct evaluation
of the total transfer matrix of the burner with flame against the separate evaluation of the burner and flame, derived from linearized Rankine-Hugoniot relations.
Identification of the tyre dynamic response from cleat test measurements
Authors: LA PAGLIA Ivano , DALLASTA Samanta , RAPINO Luca , RIPAMONTI Francesco , BARO Simone , CORRADI Roberto
Published: October 2024

The tyre dynamics strongly affects structure-borne noise and vibrations inside the vehicle compartment. Its contribution is predominant to the overall noise levels perceived by the passengers in the 0-400 Hz frequency range. In this paper, an experimental setup specifically designed
to measure the tyre radial vibrations during a cleat test is presented. To acquire the data, a laser sensor is installed on a supporting structure that moves around the tyre circumference. At the post-processing stage, attention is first paid to the extraction of the tyre free response from
the measurements. The tyre radial vibration has been visualized considering all measurement positions at different time instants. Then, an algorithm for the identification of the travelling waves constituting the signals has been developed. The results of the identification are discussed,
through a comparison with the measured signals.
Passive defect localization on a vibrating plate using Matched-Field Processing
Authors: LANGLET Théo , RAKOTONARIVO Sandrine , MICHEL Frédéric , MATTEI Pierre-Olivier , CÔTE Renaud , SARKAR Jit , KUPERMAN William
Published: October 2024

Passive defect localization on a vibrating plate using Matched-Field Processing (MFP). The aim of this study is to investigate the use of MFP for passive localization of a local change in parameter of a vibrating shell in the modal regime. Matched-Field Processing is a beamforming method
that uses the correlation between the recorded data and a controllable digital model of wave propagation (replica) to locate a source. Vibration measurements were conducted on an aluminum plate using a laser vibrometer. The plate was tested both with and without damage (added mass) while being
excited by a shaker. Replicas were created by performing modal analysis on measurements taken from the undamaged structure. Matched-Field Processing is applied directly to the measured data to locate the active source (shaker) and to the residues (field difference between undamaged and damaged
states) to locate a local variation of the parameter (defect). The method's feasibility is also being explored for passive measurements in modal analysis and residue computation.
VibraSIG - Modeling railway structure-borne noise and vibrations and implementation in QGIS geographic information software
Authors: WALTHER Robin , LABREVEUX SIDELNIK Clémence
Published: October 2024

In the context of engineering studies for passenger rail line projects, a method for predicting vibration and structure-borne noise levels in buildings close to the line is needed on the scale of a town or territory. ACOUSTB has developed VibraSig, a method for calculating railway vibration
and structure-borne noise, based on two numerical models (VibraFer, CSTB and MEFISSTO, CSTB). A numerical model in VibraFer is used to define a railway excitation source term. A numerical model in MEFISSTO is used to calculate the vibratory response of the tunnel and the ground up to the building
on a cross-section. A statistical building response model is used to estimate structure-borne noise and floor vibration levels. Finally, the method for predicting vibration and structure-borne noise levels is extended to the entire project route, and the results are visualized for each building
on a Geographic Information System (GIS).
Verification of frequency-dependent impedance boundaries for the Finite-Volume Time-Domain scheme
Authors: BORREL-JENSEN Nikolas , PREPELIţă Sebastian
Published: October 2024

Numerical simulation methods are widely used to approximate solutions to the wave-equation, taking into account the initial condition ('initial sources') and boundary conditions ('wall materials'). Trustworthy simulations are essential; a primary step is to ensure the correctness of
the implementation through a process known as code verification. In this work, we do code verification by studying the convergence of the known finite-volume time-domain (FVTD) method with a frequency-dependent boundary condition modeled as an inductance/resistance/capacitance (LRC) termination.
Due to the difficulties of obtaining an analytical solution for frequency-dependent impedance boundaries, we thoroughly derive and implement The Method of Manufactured Solutions tailored to the wave-equation inside a rectangular room for uniform frequency- dependent wall impedance. Asymptotic
estimates are found empirically based on a convergence study compared against the manufactured ground truth solution. We investigate the impact of the frequency-dependent boundaries on the convergence affected by the total sum of numerical errors and validate the theoretical properties of
the FVTD scheme for various LRC model configurations. The method should also serve as a useful resource for others to verify the correctness of their code implementations.
Measurement uncertainty of ISO CD 23351-2 - Preliminary results
Authors: HONGISTO Valtteri , KERäNEN Jukka , CARADONNA Riccardo , ASTOLFI Arianna
Published: October 2024

The purpose of our study was to determine the measurement uncertainty of ISO CD 23351-2 draft standard. Two sub-studies were conducted. In study 1, an accuracy experiment was conducted where 7 participants tested in the same room (in situ) two different products (full enclosure and
partial enclosure). In study 2, an experiment was conducted where a single participant tested two different products in several rooms varying in room volume and reverberation time. Study 1 yielded an in-situ reproducibility standard deviation of 0.80.9 dB. Study 2 yielded a between-site standard
deviation of 0.7 dB. The small standard deviations suggest that the technical content should not be essentially changed in the next versions of the standard. The results could be considered in next version of the standard ISO DIS 23351-2.
Active noise-cancelling headphones do not improve cognitive performance in office noise environment
Authors: HONGISTO Valtteri , KERäNEN Jukka , RADUN Jenni
Published: October 2024

Our purpose was to determine the influence of different use settings of on-ear ANC (active noise-cancelling) headphones on performance, experience, and physiological stress in conditions resembling an office where task irrelevant speech is present. Laboratory experiment involved 54
participants, who were exposed to five conditions: 1. No headphones, 2. Headphones without ANC operation, 3. Headphones with ANC operation, 4. Headphones with sound masking playback, 5. Headphones with ANC operation and sound masking playback. In all conditions, speech was present in the room
at 52 dB LAeq. Masking was 51 dB LAeq wideband noise played from the headphones. Participants' performance was measured with visual serial recall and 3-back tasks, and physiological stress with heart rate variability. The condition did not influence performances nor physiological stress. The
only effects of sound condition were observed in subjective experiences. With masking (conditions 4 and 5), the speech was less annoying than without the headphones (condition 1). Sound environment was estimated to impair performance and disturb concentration less than without the headphones
only in condition 5. Therefore, using headphones together with masking and ANC function can improve experience. Using headphones with ANC function alone did not improve performance nor reduce stress level.
Analyzing the impact of classroom design factors on acoustic comfort in higher education hybrid learning environments
Authors: NAZLI Che Din , ABDUL WAFI Razali , MUSLI NIZAM Yahaya , RAHA Sulaiman , ASRUL MAHJUDDIN Ressang Aminuddin , ASRUL SANI Abdul Razak , MOHD SHAHRIL Nizam Shaharom
Published: October 2024

The vitality of hybrid learning classrooms has escalated due to enabling factors including advancements in technology, the demand for flexible education, and responses to global crises. However, the inadequate preparation for implementing hybrid classrooms raises concerns about students'
ability to understand speech due to a lack of attention to the importance of acoustic quality. As a result, this study aims to investigate the impact of classroom design factors, such as ceiling height, occupancy, and spatial layout configuration, on hybrid classroom acoustic performance.
The field measurement data acquired from multiple classrooms was utilized for analysis. The impact of design factors on acoustic parameters, which comprise reverberation time (RT), speech transmission index (STI), and speech clarity (C50), was analyzed through simulation using ODEON room acoustic
software. The simulation was conducted based on two distinctive categorizations, which were determined by the size of the classrooms. The outcomes revealed that the design factors consisting of ceiling height, occupancy level, and spatial layout arrangements influenced the acoustic performance
at various microphones' locations in hybrid learning classrooms. Although the analysis effectively upholds students' learning experience and performance, it is valuable for designers and educational institutions to establish adequate acoustic qualities for hybrid learning environments.
Acoustic beamforming using maximum likelihood criteria with Laplacian model of the desired signal
Authors: JAYAN Jovit , RATHOD Kushal , YADAV Shekhar Kumar , GEORGE Nithin V
Published: October 2024

Acoustic beamforming is a technique used in audio engineering and signal processing to filter sound waves in the spatial domain. Usually, an array of microphones is used to capture sound from different directions. These array signals are then combined to reinforce each other in the
desired direction while cancelling the noise or interference from other directions. An important application of acoustic beamforming is the cocktail party scenario where multiple people speak simultaneously in a noisy room. To capture the speech of only the desired speaker, acoustic beamforming
is used. Usually, in such cases, the target speech is modelled as a zero-mean complex Gaussian distributed random variable. However, the target speech coefficients are sparse in the time-frequency domain. Hence, in our work, we model the speech coefficients using a zero-mean circular Laplacian
distribution. After modelling the target speech, we formulate a beamformer based on the maximum likelihood criteria. We add a distortionless constraint to the proposed beamformer to further improve performance. The final solution of the proposed beamformer encourages sparsity, indicating that
it models the target speech better than the complex Gaussian distribution. Simulations show the effectiveness of the proposed beamformer in capturing the target speech and rejecting interfering speakers.
Noise-insulating structures based on supercells and chirped lattices enhanced via tuning of local coupling
Authors: KRASIKOVA Mariia , PAVLIUK Aleksandra , MELNIKOV Anton , POWELL David , MARBURG Steffen , BOGDANOV Andrey
Published: October 2024

Acoustic metamaterials and phononic crystals have proven themselves to be highly promising for the development of next-level noise-mitigation systems. One of the main challenges limiting the implementation of such structures is a typically narrow operational frequency range. In this
work, we consider a periodic system consisting of locally coupled Helmholtz resonators and demonstrate that positions and widths of stop-bands can be adjusted via tuning of the coupling strength. Several approaches are developed, including the introduction of the chirped structures, supercells,
or resonators with enhanced intrinsic losses. We numerically and experimentally demonstrate that tuning of local coupling leads to a merging of stop-bands, resulting in broadband noise-insulation within the operational range covering about 3.5 octaves. This property is linked to band structures
of the associated infinitely periodic structures and discussed in terms of band-gap engineering. The low filling factor of the unit cells also suggests that the considered structures can be ventilated, which is demonstrated numerically.
Characterization of bearing health in a noisy environment using vibroacoustic approach
Authors: OSSONEMANE ASSEKO Elga , ATTAL Emmanuel , SEKKO Edgard , RAVIER Philippe
Published: October 2024

The bearing fault detection localized at outer race on a rotating machine operating in the same environment with another machine (whose wind tunnel generates a different noise) is investigated using acoustic and vibration analysis. The impact of increased acoustic and vibratory background
noise on outer race defect detection is studied through spectral kurtogram representation and envelope analysis. The spectral power densities of these two types of noise clearly show that the nature of their associated radiation (airborne or solid-borne) has a different impact. The presence
of a strongly amplified background noise demonstrates that the acoustic modality can detect the outer race defect peak at higher levels than the vibratory modality.
Preliminary study on active control of double-glazing with pressure compensation using an in-cavity microphone
Authors: MIFUNDU NZENGI Jonathan , GRANDJEAN Pierre , MICHEAU Philippe , BERRY Alain
Published: October 2024

Enhancing the sound insulation in double-glazed units involves actively controlling inter-glazing cavity pressure to decouple each glass. The optimal strategy to maximize transmission loss requires loudspeakers in the cavity to generate anti-noise and error microphones in the reception
room, outside of the cavity. However, this configuration is not suitable for a standalone product where out-of-cavity microphones are not allowed. This study presents an original method to experimentally learn the control of one loudspeaker with one error microphone, both inside the cavity,
in order to maximize acoustic isolation in a low-frequency band. The method requires a compensation FIR filter, experimentally identified during a learning phase when an optimal command is applied. Experiments were conducted using an active symmetrical double-glazed unit (30.4 x 30.6 cm, 6
mm thick, 60 mm apart cavities) in a "waveguide" setup. Results show an average transmission loss gain from 50 to 550 Hz of 10 dB with in-cavity microphone compensation. It nearly reaches optimal performance, 11 dB reduction in transmitted waves, compared to 7 dB for the uncompensated
in-cavity microphone. This encouraging preliminary result leads to further developments to extend the method to multiple loudspeakers and multiple microphones.
A comprehensive study for a classification scheme for dwellings in Brazil
Authors: HOLTZ Marcos , MACIEL Candida , SCHMITT Rafael , DA SILVA Otávio Joaquim , FRIAS Juan , MONTEIRO Carolina
Published: October 2024

ABNT NBR 15575 was published in 2013 and establishes acoustic insulation criteria for residential buildings in Brazil. This standard presents three levels of performance - minimum (mandatory), intermediate, and superior - through an informative annex that classifies the acoustic performance
for each requirement. Even after ten years of publication, the application of the standard is still not fully consolidated, although its application is mandatory under Brazilian law. This article proposes a classification of the entire acoustic system of dwellings, intending to enable the
general public to understand acoustic performance quickly and intuitively, thus encouraging its application. The proposed classification scheme is based on ISO/TS 19488:2021, which presents harmonized criteria for different acoustic requirements. A large database of field measurements of building
systems, typical of Brazil and obtained in different regions, was analyzed to verify the distribution of samples using this new scheme. An A/B/C/D scale is proposed, and results are presented for airborne sound insulation/impact between dwellings, airborne sound insulation for facades, and
criteria for equipment sound levels in commercial buildings.
Wind tunnel testing and modelling of a rod-airfoil setup: validation and 3D acoustic imaging
Authors: ERBIG Lars , LANDI Simone , BOULEY Simon , MINCK Olivier , COLANGELI Claudio , HALLEZ Raphael , CUENCA Jacques , SANDERS Martinus P.J.
Published: October 2024

This work revisits the rod-airfoil benchmark experiment from Jacob et al. (2004) with the aim of performing a detailed numerical validation in the nearfield and far field as well as to perform 3D acoustic imaging. The setup consists of a rod near the leading edge of a NACA-0012 airfoil
and is placed in a semi-open wind tunnel in anechoic conditions. In addition to a far-field microphone array, the setup is equipped with two planar microphone arrays as well as wall-mounted microphones on the closed wind tunnel section and on the airfoil. The setup is modelled using a second-order
finite volume method, and particular attention is devoted to including installation effects and sensor response properties in order to guarantee simulation accuracy. Validation examples are provided, including single microphone spectra as well as the acoustic field reconstructed on the test
object by means of 3D acoustic imaging using the planar microphone arrays. Finally, the experimentally-validated numerical model is used as a means to gain further insight into the tested object. For instance, the model allows to separate acoustical and turbulent effects present in the sensors
located within the flow section.
A pilot study: developing acoustic model for immersive environment
Authors: RAHA Sulaiman , FATIN NURSYAFIQAH Khairul Anuar , NAZLI Che Din , ASRUL SANI Abdul Razak
Published: October 2024

In the landscape of higher education in Malaysia, the adoption of immersive technologies still in its infancy, particularly within the field of building science education. This research endeavors to elevate the learning experiences of Indoor Environmental Quality (IEQ) concepts, with
a specific focus on lighting and acoustics. The ongoing study seeks to revolutionize current learning methodologies by converting traditional modules into an immersive virtual environment, offering learners an interactive, and sensory-rich experience with the subject matter. To ensure the
effectiveness of the acoustic immersive environment, this paper prioritizes the initial step of developing the acoustic simulation model. In an early pilot study, on-site measurements of sound pressure levels were recorded at various points within a basic classroom setting and an acoustic
model will be developed subsequently. Consequently, the alignment between the developed acoustic model and real-world physical measurements establishes a solid foundation for the subsequent calibration process, during which the acoustic model will be tailored to meet VR-ready specifications
delve into immersive environment model. This finding ensures a seamless transition of real-world acoustic conditions into the virtual realm, amplifying the authenticity and educational impact of the VR learning experience, thereby contributing to the advancement of immersive technologies in
higher education.
Analysis of the perceived intensity of vibratory stimuli driven by the Modal Overlap Factor
Authors: VICENTE Thibault , MAILLARD Mathias , LEPAN Jules , CHOUARD Nicolas , PELAT Adrien
Published: October 2024

The vibro-tactile perception experiment reported in this paper aims to investigate correlations between the perceived vibratory intensity and the Modal Overlap Factor (MOF) of vibratory stimuli. The MOF is often used to physically characterise the vibratory behavior of a structure and
can be estimated from the product of frequency, modal density and modal loss factor. In this experiment, stimuli are applied to the participant's hands by means of a steering wheel set in vibration by a shaker. The vibratory stimuli are synthesized from filtered white noise convolved with
an impulse response defined as a sum of damped sine waves. The MOF can be controlled by selecting the number of sine waves, their frequency and damping ratio. A set of 100 stimuli, with MOF values ranging from 2 to 200%, in the 5-305Hz range, and equalized in acceleration, is used. Each of
the 80 participants is asked to rate twice the perceived intensity of 10 stimuli, pseudo-randomly chosen among the 100 stimuli. Data are analyzed to establish trends between perceived vibratory intensity and the physical parameters of the stimuli.
Adaptative scheme for diffuse field response of multilayered structures
Authors: DAZEL Olivier , CHEVILLOTTE Fabien , GABORIT Mathieu , JAOUEN Luc
Published: October 2024

The computation of the diffuse field response of multilayered homogeneous structures leads to integrals which should be computed efficiently. This is all the more true as the frequency increases, since the integrand has localized peaks. The objective of this communication is to propose
an adaptive integration scheme that aims to limit the number of resolutions of the physical problem and to maximize the reuse of previous evaluations in the course of the method. After discussing the usual integration methods, the proposed method will be presented. A first approximation of
the integral is performed with two nested integration schemes with a coarse mesh of the initial integration domain. A local error indicator is derived and leads to a first partition. On each set of the latter, and depending on the local error estimated previously, an adequate numerical scheme
is chosen. The error is controlled during all the process and it is iterated until convergence. The method is tested first on academic cases and then on industrial cases. The performance of the method is discussed, taking into account not only the number of evaluations of the physical function,
but also the additional numerical cost generated by the adaptation process.
Lightweight waveguide absorbers based on spiral acoustic black holes for reducing structural vibrations in mechanical systems
Authors: JEON Wonju , TAEHWAN Son , SEONGMIN Park
Published: October 2024

We present an ABH-based solution to address challenging industrial problems related to structural vibration and vibration-induced noise. To tackle those problems, we utilize lightweight waveguide absorbers (WGAs) based on spiral acoustic black holes (ABHs). The WGA is designed by combining
a spiral acoustic black hole with a rod to absorb flexural waves and dampen the vibrations in dynamic systems. The WGAs are customized to industrial needs, pursuing both high-damping performance and lightness. Specifically, we design non-identical configurations of WGAs by taking multiple
or broadband target frequency ranges into account. We then determine optimal attachment positions and directions of the designed WGAs while considering constraints on installation space and total weight of WGAs. Numerical and experimental results verify the feasibility to meet the requirements
of industries through the use of WGAs, thereby opening up the possibility of practical applications to real-world problems.
Acoustic aspects in the construction and upgrading of military firing ranges - Part 2
Authors: KLEINHENRICH Christian , BECHTEL Philipp , HIRSCH Karl-Wilhelm
Published: October 2024

Military firing ranges are indispensable facilities to train armed forces in handling and use of small arms. In the past, such ranges were outdoor installations. Due to noise problems around some of these shooting ranges they will be replaced more and more by indoor shooting facilities,
which increases the noise impact on the personnel. First, the design of shooting ranges must consider the internal and external firing safety. However, acoustics comes next. There are two different but equally important objectives. The facilities should be built in such a way that (1) the
noise impact on the hearing of personnel and (2) the noise impact on the neighbourhood is as low as possible. The design of shooting ranges should already take these aspects into account during the planning phase. This article focusses on the topic of acoustic safety (1) and is divided into
two parts. Part II: The second part of the article describes the practical application of the new directive, with its acoustic material and measurement requirements, based on a recent tendering procedure in which various companies were offered the opportunity to develop acoustic wall and ceiling
systems for indoor shooting ranges as part of a so-called competitive dialog.
Case-study analysis of traffic noise at Vesterbrogade, Aarhus, Denmark
Authors: KÆRSAA Laura , GISLADOTTIR Arnthrudur , KHAN Jibran
Published: October 2024

This paper analyses the livability, concerning traffic noise, in apartment buildings along one of the most heavily trafficked streets in Aarhus, Denmark. The case-study site is analyzed with noise prediction models and different improvements on the sound environment are proposed through
qualitative aspects. The analyses are conducted using two different noise prediction models, opeNoise in QGIS and SoundPLAN. OpeNoise uses the noise prediction method CNOSSOS and SoundPLAN uses Nord2000. Noise maps 1,5 m above the terrain and facade noise levels are calculated. The results
show noise levels on the facade far above WHO's limit, of . The noise pollution in the open space next to the roads also shows noise levels far above the recommendations, while the inner courtyard shows acceptable noise levels. Several subjective improvements of the sound environment are proposed,
such as vegetation between the road and the building. Furthermore, different designs were proposed to reduce the amount of noise-polluted facades. This research work emphasizes the importance of considering qualitative parameters simultaneously with the noise prediction models.
PLANNING OF THE TRANSPORT LOAD OF THE CITY AREA
Authors:   Lipetsk State Technical University, Lyapin Sergey Alexandrovich , Kadasev Dmitry Anatolyevich ,   Lipetsk State Technical University, Dmitriev Semen Anatolyevich ,   Lipetsk State Technical University, Voronin Nikita Vladimirovich ,   Lipetsk State Technical University
Published: October 2024

. Transport load planning is one of the most important stages of urban development. A survey of the main characteristics of the traffic flow was conducted. Simulation transport modeling was chosen as the method of studying the redistribution of transport load. The assessment of the transport load of the city area was carried out on the basis of indicators of the effectiveness of traffic management.
THE EFFECTIVENESS OF MEASURES TO IMPROVE ROAD SAFETY, TAKING INTO ACCOUNT THE TARGET GROUP OF DRIVERS IN THE FRAMEWORK OF THE IMPLEMENTATION OF THE ROAD SAFETY STRATEGY
Authors:   Penza State Agrarian University, Ilina Irina Evgenievna
Published: October 2024

The subject of the study is the possibility of improving road safety through driver training, taking into account its target group. Statistical data on accidents in the Russian Federation with the participation of drivers of different target groups for 2022 according to the free access platform are presented. The generalized result of the analysis of the works of scientists on the topic of improving road safety by studying the behavior and actions of drivers is presented. To improve road safety, training methods were used taking into account the target group of drivers and their effectiveness was confirmed.
DEVELOPMENTOFRESERVEASSESSMENTTOOLSTHE CAPACITY OF RAILWAY SECTIONS BASED ON THE CREATION OF A DIGITAL TWIN AND THE USE OF AN ARTIFICIAL NEURAL NETWORK
Authors:   Rostov State Transport University (RSTU), Chebotareva Evgeniia Andreevna
Published: October 2024

The article proposes the development of artificial intelligence technologies and the development of specialized research tools for ways to enhance the capacity of the direction based on the creation of a digital twin of a real railway section of the North Caucasus Railway with heavy freight and passenger traffic in the direction of the ports of the Azov-Black Sea basin and resorts in Southern Russia. The task of intelligent (neural network) control of the transportation process is actualized, the problems of modeling complex objects are disclosed and the subtasks of conducting an experiment on the choice of control actions for operational capacity increase on a railway section are formed.
ENSURING THE CONTROLLABILITY OF SPECIAL-PURPOSE TRANSPORT AND TECHNOLOGICAL VEHICLES WITH ULTRA-LOW PRESSURE TIRES WHEN DRIVING ON PUBLIC ROADS
Authors:   Nizhny Novgorod State Technical University, Vakhidov Umar Shakhidovich , Manyanin Sergei Evgenievich ,   Nizhny Novgorod State Technical University, Molev Yuri Igorevich ,   Nizhny Novgorod State Technical University, Cherevastov Maksim Gennadievich ,   Nizhny Novgorod State Technical University
Published: October 2024

The results of the analysis of changes in the controllability of vehicles when driving on ultra-low pressure tires on public roads are presented. The presence of a significant influence on the reaction of a wheeled vehicle of the frequency of the control action has been proved. Such an in-dicator of the change in controllability as the delay in the angular velocity of rotation of the wheeled vehicle from the control action is proposed. The results of mathematical modeling of the effect of the parameters of ultra-low pressure wheels on the directional controllability of all-terrain vehicles are obtained. The data provided made it possible to identify the safest tire stiffness parameters (and hence the amount of air pressure) the vehicle, affecting its active safety, as well as determine the limits of their permissible modification. It has been established that in the entire range of changes in the parameters of ultra-low pressure tires, the speed of all-terrain vehicles on public roads should not exceed 50 km/h.
ENSURING SAFETY OF FUEL TRANSPORTATION MOBILE GAS STATIONS
Authors:   Saint Petersburg State Universityof Architecture and Civil Engineering, Goncharova Iana Dmitrievna
Published: October 2024

The article provides statistics on the number of road accidents involving dangerous goods on Russian roads, and also examines the dynamics of the number of trucks intended for transporting dangerous goods and large and heavy cargo. The foreign experience in regulating the activities of mobile gas stations is described.
PENGGUNAAN EAR PLUG EFEKTIF MENINGKATKAN KUALITAS TIDUR PASIEN ICU: STUDI PROSPEKTIF
Authors: Waladani Barkah , Utami Wuri , Ernawati Ernawati
Published: October 2024

Gangguan tidur sering terjadi pada pasien di ruang Intensive Care Unit (ICU) dan dapat memengaruhi pemulihan klinis mereka. Penelitian sebelumnya menunjukkan bahwa gangguan tidur pada pasien ICU sering disebabkan oleh faktor lingkungan, seperti kebisingan di sekitar ruang ICU. Intervensi sederhana, seperti penggunaan ear plug, mungkin dapat membantu mengurangi gangguan tidur yang disebabkan oleh lingkungan ICU. Penelitian ini bertujuan untuk mengevaluasi efektivitas penggunaan ear plug dalam meningkatkan kualitas tidur pasien di ruang ICU. Desain penelitian yang digunakan adalah desain pre eksperimental. Sampel terdiri dari 45 responden dengan kriteria pasien dirawat di ruang ICU minimal 3 hari, usia lebih dari 18 tahun, dan tidak dalam keadaan hamil. Responden diberikan intervensi ear plug sebelum tidur pada malam hari selama 2 hari, dengan teknik consecutive sampling. Pengukuran kualitas tidur dilakukan sebanyak 2 kali menggunakan the Richard Campbell Sleep Questionnaire (RCSQ), sebelum dan setelah 2 hari pemberian intervensi ear plug. Hasil penelitian menunjukkan bahwa penggunaan ear plug secara signifikan meningkatkan kualitas tidur pasien di ruang ICU. Skor kualitas tidur, yang diukur menggunakan RCSQ, mengalami peningkatan yang signifikan setelah intervensi ear plug. Hal ini menunjukkan bahwa pasien cenderung mengalami tidur yang lebih baik, lebih nyenyak, dan kurang terganggu oleh gangguan lingkungan di sekitar ruang ICU setelah menggunakan ear plug.
Klee e a utopia do movimento
Authors: Fiori Arantes Otília Beatriz
Published: October 2024

Publicado na Revista Discurso em 1976, Klee, a utopia do movimento, ensaio a bem dizer de estreia de Otilia Arantes ao voltar de seu doutorado na França, “encharcada” de Filosofia Francesa, como chegou a declarar em entrevista, vale como um documento histórico de um momento de sua crítica — à época mais voltada para as artes visuais. O texto é na verdade um longo comentário à famosa afirmação de Paul Klee: “a arte não reproduz o visível, ela torna visível”: “Visão sem correlato, a pintura recuaria do visto ao próprio ver, dos objetos que incidem sobre o olho e das formas que aí se desenham, ao próprio olho e ao ato de olhar — do constituído ao constituinte, da significação à gênese das significações. Pela ausência de objeto (“a arte... torna visível”), a percepção visual ganharia anterioridade em relação ao mundo dado, e a pintura, não mais refigurativa, alcançaria o estatuto de ‘filosofia figurada da visão’ — como a define Merleau-Ponty”, fazendo de Klee a ilustração feliz de suas formulações teóricas. No entanto — e aqui Otília começa a se distanciar do Filósofo —, a “utopia de uma obra de arte puramente dinâmica” perseguida por Klee, talvez não corresponda exatamente ao mero “entrelaçamento de visão e movimento", como se lê em L’Oeil et l’Esprit, isto é, por simples contaminação. Para fugir à tradição pictórica, sujeita ao despotismo do ver, e, portanto, à “representação”, o pintor propõe, em contrapartida, especialmente em seus cursos na Bauhaus, uma pintura como “puro movimento”, inspirando-se, seja nos movimentos da natureza, seja nas artes do movimento, como a música e a dança — “formas-motrizes” capazes de agir sobre o espectador de modo a transformar sua recepção visual passiva em corporal e ativa. Segundo Klee, passar dos objetos às sensações significa passar de um saber do olho a um saber (ou sentir) do próprio corpo, é abandonar o puro entendimento ou a razão em nome da sensualidade, ou de algo como o “desejo”, não no sentido freudiano de Wunsch (que implica teleologia, ou seja, realização, ou preenchimento), mas como força-produtiva  — o conceito é de Jean-François Lyotard em Discours Figure, que toma também como exemplo Paul Klee, e serve de guia nas conclusões a que chega o ensaio da jovem Otília Arantes.
Palavras-chave: O Corpo, Desejo, François Lyotard, Gestualidade, Linha, Merleau-Ponty, Movimento, Música, Natureza, Olhar, Paul Klee, Representação, Sensação, Visão.