bluuebunny/crossref_metadata_2025 huggingface dataset:
Identification of the Payne effect in a viscoelastic material coupling Bayesian identification and digital twin
Authors: SADOULET-REBOUL Emeline , TELOLI Rafael O. , JABOVISTE Kévin , CHEVALLIER Gaël
Published: October 2024

The Payne or Fletcher-Gent effect is a particular behavior occurring in viscoelastic materials containing fillers. It induces a nonlinear dependency of the viscoelastic storage modulus on the amplitude of the applied strain. This amplitude dependency must be taken into account in engineering
applications as it does change the elastodynamic behavior of the overall structure integrating the material. A methodology is developed in the proposed work to identify this nonlinear effect. The approach first starts with the identification by Bayesian inference of the frequency and damping
properties of a viscoelastic sample. The input data are obtained from a modified Oberst test, conducted for different displacement load amplitudes. A digital twin of the experimental set-up is then used to evaluate the stiffness behavior, and in particular the Young's modulus of the material,
at the measured frequencies, and to deduce the strain level within the sample. This work shows that the Payne effect, which leads to the decrease with the amplitude of the Young's modulus, can thus be estimated in terms of mean and standard deviation by combining experiments and numerical
simulations.
Following up on "Alarming sound: A case study of noise in an emergency department"
Authors: VAN WEZEL Cees , VEEN Judith
Published: October 2024

Building on "Alarming Sound: A Case Study on Noise in an Emergency Ward," this follow-up study aims to explore the outcomes of a redesigned floorplan on the Jeroen Bosch Hospital in the city of Den Bosch (NL), it's emergency department staff experiences and workplace dynamics
focusing on sound. Leveraging both qualitative and quantitative research methodologies, the study seeks to investigate anticipated changes in staff satisfaction, communication efficiency, and the overall work environment following the implementation of spatial modifications. While the outcomes
of these interventions are yet to be determined, the research aims to contribute to the existing body of knowledge on the impact of physical workspace changes on healthcare delivery and staff well-being. This research aims to help develop healthcare environments that improve working conditions
and better patient care outcomes.
Adaptation and evaluation of Pyroomacoustics for auralization purposes
Authors: SALMON François , VERRON Charles , CAMIER Cédric , MALGRANGE Marina
Published: October 2024

An open-source room simulation software that relies on geometrical acoustics - Pyroomacoustics - was used to compute Binaural Room Impulse Responses (BRIRs) of existing rooms that are modeled in the Benchmark for Room Acoustical Simulation (BRAS). Modifications were made to the software
to investigate the impact of the scattering model on the acoustic parameter values. A comparison with the acoustic parameter measurements showed that the values of EDT, C80 and D50 were found to be closer when using the Vector-Mixing method in comparison with the original scattering method.
Overall, the alternative method reduced by 95% the mean squared error on the acoustic parameter values. The sound source directivity was also considered in the simulations to quantify its influence on the perceived auditory scenes. A listening test was then conducted to compare binaural renderings
derived from measured and simulated BRIRs. Results showed that ratings of the modified versions of the software were either not significantly different or significantly higher than those of the original version depending on the room and sound source. Including the source directivity significantly
improved the perceptual ratings, which is thought to be due to the reduction of spectral and loudness differences with the measured reference.
Prediction of one-dimensional acoustic field with axial temperature gradient using neural networks
Authors: DHARANALAKOTA Veerababu , GHOSH Prasanta Kumar
Published: October 2024

The study of sound propagation inside the ducts finds extensive application in aerospace, automobiles, speech, and biomedical sectors. This paper presents a neural network-based formulation to estimate the acoustic field inside a uniform duct with temperature gradient along the axial
direction. The governing differential equation is derived from the momentum, energy, and state equations. The acoustic field is approximated with a feedforward neural network, and the problem is converted to an unconstrained optimization problem using the trial solution method. The training
process is performed using the L-BFGS optimizer and the sine activation function. The acoustic field inside the duct is predicted up to 2000 Hz for linear and exponential temperature profiles. The predicted results are in good agreement with those obtained from the traditional Range-Kutta
solver with a maximum relative error of 0.1%. Furthermore, the classical Helmholtz equation without the temperature gradient is solved using the developed neural network formulation. Using these results, a comparative study is conducted to understand the effect of the temperature gradient
on the acoustic field inside the duct.
Pros and cons of equipping Harmonic Acoustic Pneumatic Sources (HAPS) with quarter wave tube: analytical model versus experimental validation
Authors: GRANDJEAN Pierre , SCHIAVINI Alexandre , MICHEAU Philippe
Published: October 2024

Pneumatic acoustic sources enable high Sound Pressure Levels (SPL). Harmonic Acoustic Pneumatic Sources (HAPS), utilizing airflow modulation to create precise acoustic pressure fields with controlled amplitude and phase, emerge as solutions for active harmonic-noise control at high
SPLs. While theoretically capable of generating pure tones, HAPS appear to be non-linear sources with significant harmonic distortion in practice. Additionally, the mass airflow consumption of this source could be a drawback in certain applications. The aims of this study is to evaluate the
advantages of a Quarter-Wave Tube (QWT) located at the HAPS output. A numerical analytical linear model has been developed to compute the radiated acoustic pressure and consumed mass air flow, according to the QWT and HAPS characteristics. For the cases of HAPS equipped with various QWT, this
presentation will compare experimental results with the analytical model. This aims to highlight the advantages, including increased SPL of the radiated fundamental, reduced fundamental/harmonic distortion over a wide frequency range, and decreased airflow consumption. The disadvantage is
related to the space required by the QWT because its diameters must be greater than the HAPS output. Whatever, this study demonstrate that HAPS can be improved when equipped with a dedicated exhaust.
Acoustic waves propagating through a fluid area containing randomly distributed coated cylinders
Authors: SELLAMI Asma , SELLAMI Asma , NJEH Anouar , FRANKLIN Hervé , MARECHAL Pierre
Published: October 2024

The research investigates acoustic wave propagation through a fluid region containing randomly arranged cylinders coated in identical materials, resulting in multiple scattering and the emergence of an effective wave. It examines the impact of the coating's viscoelasticity, cylinder
material, and scatterer volume fraction on this wave. Additionally, it analyzes dispersion and attenuation as acoustic waves interact with the fluid region containing scatterers, particularly emphasizing normal incidence. This comprehensive study advances the understanding of wave scattering
in random media, shedding light on this complex phenomenon. By delving into the complex interplay between wave behavior and material characteristics, the research provides valuable insights that can inform various acoustics and materials science applications, contributing to advancements in
these fields.
The effects of multitalker babble noise on children's cognitive performance
Authors: SPICCIARELLI Gaia , GHELLER Flavia , ARFé Barbara
Published: October 2024

Classroom noise, particularly irrelevant speech or background babble noise, can have detrimental effects on academic tasks and learning more generally. Researchers have proposed two alternative explanations of the interference of babble noise on non-auditory academic tasks, such as
reading or math: i) Babble noise may generate interference on these tasks due to the automatic access of speech sounds (babbling) to phonological short-term memory; or ii) by capturing children's attention, thereby diverting general attentional resources from the task. To test these hypotheses,
we asked 3rd to 5th graders to perform two visual attention and two verbal working memory tasks (digit span and reading span) in both quiet and noisy conditions. Multitalker babble noise was administered through headphones at 65dB. The results revealed significant noise effects only in the
most complex verbal working memory task (reading span). Interestingly, a significant difference between conditions was also observed in one of the visual attention tasks, where higher scores were, however, achieved in the presence of noise. These preliminary findings will be discussed in light
of the current literature.
Directional wind turbine noise prediction plots and prevalence histograms for community consultation
Authors: DELAIRE Christophe , ADCOCK Justin
Published: October 2024

In Australia, wind turbine noise is predicted using international standards and guidelines with a set of conservative assumptions. For example, wind turbine noise predictions using the ISO 9613-2 method are based on a scenario in which each receiver is simultaneously downwind of every
wind turbine. As such, winds that are outside of the downwind direction range will result in lower wind turbine noise levels than predicted using ISO 9613-2. These predictions are also based on the assumption that each turbine is simultaneously generating their maximum noise emissions, whereas
variations in winds speeds across the site will frequently result in individual turbines producing lower noise levels than assumed in the modelling. The net effect of these conservative assessment choices is that actual wind turbine noise levels would be lower than presented in noise assessments
in many cases. Providing an indication of how frequently predicted noise levels would likely occur can assist community consultation and provide useful context to noise modelling data. This paper presents analysis utilising directional noise modelling to assess the effect of wind direction,
combined with an analysis of historic wind records, to determine the range of predicted noise levels and how frequently they may occur.
Correlation between soundscape and sense of culture in historic public space
Authors: XIE JIAYU , KANG JIAN , OU ZHENYU , LI PEILUN
Published: October 2024

Soundscapes, as part of cultural heritage, have attracted attention for their role in crafting atmospheres and fostering a sense of place. It is still unclear how soundscapes and the sense of culture interlink within historic public spaces. This research explores how soundscape elements
influence the sense of culture in historic towns. Twenty-five typical railway-type historic town public spaces in northern China are selected as examples. We restored the field situation in the laboratory. Through correlation analysis in SPSS, we analyzed the relationships between soundscape
elements (encompassing objective environmental attributes and subjective perception) and cultural senses. The result shows: 1) Natural sounds, people sounds, and cultural activities sounds like music/shows significantly influence the sense of culture in historical spaces along the Chinese
Eastern Railway (CER). 2)Calm and stable sound environments contribute to creating a cultural atmosphere. 3)Pleasure and eventful sounds strengthen people's connection to culture. 4)Enclosed spaces, pedestrian-friendly environments, and bustling crowds enhance the cultural ambience. 5)Visual
perception correlates more strongly with the sense of culture than auditory evaluation. This research provides valuable insights for enhancing cultural senses in historic towns through soundscape design.
Comfortable sound design based on auditory masking with chord progression and melody generations using automatic composition
Authors: HAYASHI Takuya , YAMAGUCHI Daisuke , TAKAHASHI Toru , NISHIURA Takanobu , NAKAYAMA Masato
Published: October 2024

Unpleasant noise is a crucial problem, that we often face in daily life. One of such a problem is in the case of dental treatment. A dental instrumental noise that includes peaky components in the high-frequency band makes doctors and patients discomfort. To reduce discomfort, we proposed
a method to mask unpleasant noise with a comfortable sound. The proposed method was automatically generating a comfortable cord progression. In previous subjective test results, it shows that degree of discomfort reduces. The remaining problem is that degree of comfort improves. This is due
to the fact that the previous method utilizes the musical element of chord, but does not introduce the musical elements of melody and rhythm. Therefore, in this paper, we propose a new method to introduce the melody generation with automatic composition (AI composition) into the previous method
based on the automatic generation of the chord progression. The proposed method automatically generates a chord progression to follow the peak frequency of dental treatment sounds and to add a melody following the chord progression with AI composition assistance tool to improve comfort and
to design comfortable sound.
Revision of Sabine's and Eyring's reverberation theories
Authors: HANYU Toshiki
Published: October 2024

Sabine's and Eyring's reverberation theories are still the most important theoretical frameworks for room acoustics. The important physical quantities derived from these theories are the average sound pressure level (sound energy density) and the reverberation time (sound energy decay).
Eyring revised Sabine's theory to become the reverberation time zero in the perfect absorption condition. However, Eyring's theory has contradictions regarding the sound energy density in a steady state and the energy decay from the steady state. In this study, in order to resolve these contradictions,
the theoretical framework for the consistent system is presented introducing the new concept of the average impulse response in a room, and the contradictions in the current room acoustic theory are clarified. Based on the theoretical framework, Sabine's reverberation theory is revised by
a different way of Eyring's theory. The reverberation time of the revised theory is shorter than that of Sabine's theory and longer than that of Eyring's theory. Finally, ray-tracing computer simulations were performed to verify the revised theory. Results of sound ray tracing simulations
were in better agreement with the values calculated using the revised theory rather than those calculated using Sabine's and Eyring's theories.
The impact of a large airport on residents' quality of life and annoyance
Authors: SIEBEN Naomi , AALMOES Roalt , SCHRECKENBERG Dirk , BARTELS Susanne , OHLENFORST Barbara
Published: October 2024

A nearby large airport provides both positive and negative impact on surrounding communities. It can provide economic growth for a region near an airport, but also have a negative environmental and health-related impact with respect to aircraft induced noise exposure and air pollution.
To study the impact of aircraft noise together with other aspects of air traffic in an airport region on the quality of life (QoL) and annoyance of residents in surrounding regions, a survey regarding nine QoL indicators was conducted for two Dutch communities. A comparison was made between
one higher aircraft noise exposed community situated near Schiphol airport and one in Utrecht without a neighbouring airport and thus less exposed to aircraft noise. Results showed more aircraft noise-annoyed people living near the airport than people living further away. Using a Principle
Component Analysis, the nine extracted factors supported previously theorized indicators defining QoL. Noticeable differences were found in neighborhood trouble, social contacts and aerospace perception between these two communities with the airport as main discriminator. Outcomes of this
study help to develop a model to measure QoL and improve the understanding of the impact of noise exposure and other characteristics of a nearby airport on people's well-being.
A basic study on sound insulation characteristics of Triply Periodic Minimal Surface by using the finite element method
Authors: YANO Takumi , SUGAHARA Akiko , HIRAGURI Yasuhiro , DOTERA Tomonari
Published: October 2024

Triply periodic minimal surfaces (TPMS) have garnered attention in the field of natural science. For example, these structures are observed in insect wing scales, where their intricate periodic structures create structural colors via the reflection and interference of certain wavelengths
of light. The objective of this study is to utilize the acoustic analogy of such photonic properties for sound insulation. In a previous report, it was found that the bandgap of G-surface, which is one of TPMS, enabled us to insulate sound effectively at specific frequencies. Furthermore,
it was suggested that sound insulation performance can be improved by compressing the structure along the incident direction while maintaining its thickness. In this paper, we focus on the P-surface, which is a typical TPMS other than the G-surface. The sound insulation properties were calculated
by numerical analysis and compared with those of the G-surface. As a result, it is found that P- and G-surfaces are effective structures for different frequency bands. In addition, compression of the P-surface along the incident direction in the same manner as in the previous study improves
the sound insulation performance without increasing the thickness, as well as G-surface.
Azimuth perception of virtual sources in automotive environment : speech and musical stimulus
Authors: CHARPENTIER Thomas , PARIZET Etienne
Published: October 2024

The spatial reproduction of musical media in car environment presents a number of challenges, due to the fact that the loudspeakers are not symmetrical in relation to the listeners and to the unique acoustic characteristics. In particular, the positioning of virtual sources is difficult
to apprehend, unlike in conventional stereophonic configurations. In an initial study, it was shown that an azimuth perception model, the extended energy vector, produced results that were consistent with experimental data. As the first experiment was carried out using only a short burst of
pink noise, it seemed interesting to compare this model with other data from more natural signals. New experiments were therefore carried out using audio samples such as speech and instruments. The subjects, seated in the driving seat, pointed their noses in the perceived direction of the
signal, their head movements being recorded with a headtracker. The model will be compared with these new experimental data.
Improving knowledge of the acoustic factors involved in railway noise annoyance: first results of a pilot field survey of sixty-two local residents
Authors: SINEAU Matthieu , HELLOT Manuel , MAFFEIS Robin , MIETLICKI Fanny , MOTIO Laure , CHERFAN Sarah , BASSINOT Julien , EVRARD Anne-Sophie , REGAIRAZ Jean-Philippe , ROSIN Christophe
Published: October 2024

Railway transportation contributes to the objectives of decarbonization but also generates negative externalities, including noise. Energy noise indicators used to characterize population exposure do not adequately reflect the repetitive nature of railway noise peaks. The GENIFER pilot
study aims to test a protocol designed to characterize railway noise events according to the instantaneous perceived annoyance when the train is passing, in order to improve understanding of the influence of acoustic factors on annoyance. The first phase of the survey was carried out in 2023
among 62 residents of a pilot site. An electronic device was used to collect around 5,000 ratings, ranging from 1 to 10, assessing the instantaneous annoyance induced by train noise at passing trains. The site instrumentation included sixteen sound level meters and two video recording systems,
enabling annoyance ratings to be associated with the acoustic characteristics of railway noise events. A questionnaire aimed at identifying co-determinants of long-term annoyance was also administered to participants. Feedback on the field implementation of this survey and initial results
concerning acoustic measurements, instantaneous annoyance ratings and questionnaire responses will be presented.
Measured and predicted sound transmission through a laboratory concrete floor
Authors: HOELLER Christoph , MUELLER-TRAPET Markus
Published: October 2024

The direct sound transmission through a simple, massive, homogeneous building element with and without lining is investigated experimentally and compared with analytical and empirical models from the literature. A 150 mm thick concrete floor and a 100 mm thick floating floor were measured
in the floor transmission facility of the National Research Council Canada, i.e. without flanking sound transmission. In addition to the sound reduction index and the normalized impact sound pressure level, loss factors, radiation efficiencies, and mean squared velocities were recorded in
the laboratory. The measured data is compared to established models of sound transmission. A focus is placed on the calculation model of ISO 12354-1 (Appendix B), which uses calculated radiation efficiencies and loss factors to predict the sound reduction index of heavy, homogeneous building
elements. Some difficulties with the calculation model and the examples in the standard are discussed. In principle, the results in this study show that the calculation model of ISO 12354-1 gives good estimates when the correct input parameters are used. However, deviations between the calculated
and the measured loss factors and radiation efficiencies have large effects on the accuracy of the estimates, particularly in the region around the coincidence frequency.
Quantification of core noise using coherent output method: experiment and result on turbofan demonstrator
Authors: DREUX Marc , DELSCLUSE Bruno , SIJTSMA Pieter , LENEVEU Romain , MARDJONO Jacky
Published: October 2024

New turbofan architectures have increasing bypass ratios which makes the core noise an more important source. An identification of its contribution in the total noise has been performed on a DGEN380 turbofan demonstrator using pressure measurement: The remote pressure probes with piezo-electric
pressure sensors are installed at 14 locations in the nozzle. The far field noise was caught using 25 microphones array parallel to the engine axis. A coherent output power analysis based on multiple reference channels was applied to identify the active part of the combustion noise and in
a reciprocal way the acoustic component in the duct propagated in the test room. The processing allows to calculate the far field contribution and directivity of the core noise. K-type thermocouples were implemented to quantify temperature fluctuations in the engine nozzle. The thermocouples
were manufactured with two different wire diameters (from 25 to 80µm) which give different frequency responses. An in-situ compensation method was developed to correct the signal and increase the useful frequency range of the temperature measure. This allows to cover the whole core noise
frequency range. This project has received funding from the Clean Sky 2 Joint Undertaking (JU) under grant agreement No. 886554.
An efficient framework for design optimization using parametric reduced order modeling in a virtual prototyping phase
Authors: BIANCIARDI Fabio , SALAMONE Nicolo' , DE GREGORIIS Daniel , VAN OPHEM Sjoerd , CORBEELS Patrick , JANSSENS Karl
Published: October 2024

Virtual Prototype Assembly is a tool enabling the virtual assembly of components, the prediction of noise and vibration performance, and the evaluation of component modification scenarios. FRF-based substructuring is the technique used to assemble the components, either obtained from
experimental measurements or numerical simulation models. However, numerical simulations of components can be time-consuming, especially when exploring several component design modifications of large models. The paper proposes a framework combining Virtual Prototype Assembly with a parametric
Model Order Reduction technique for vehicle design optimization. The proposed parametric Model Order Reduction technique generates a Reduced Order Model of a component maintaining an explicit dependency on material parameters and properties, such as: Young's Modulus, density, Poisson coefficient,
connection stiffness, etc.. This enables fast and efficient simulation of components designs without the need of recomputing numerical models, thus streamlining the component design optimization process. The effect of component design modifications will be assessed at the predicted target
vibration levels on an academic application case.
Realization of global audio telepresence via a learning-based model-matching approach with an acoustic array system
Authors: CHEN You-Siang , CHEN Sing-Yu , BAI Mingsian
Published: October 2024

A Global Audio Telepresence (GOAT) system requires a microphone array to capture the spatial audio signals in the far end and a loudspeaker array to reconstruct the sound field in the near end. This seamlessly immerses near-end users in remote audio scenes with full ambience. In this
paper, we use a learning-based GOAT system (L-GOAT) based on the model-matching principle, where a deep neural network (DNN) acts as non-linear filters for the GOAT system. The network training attempts to minimize the matching error between the signals reproduced by the DNN and the desired
signals filtered by the far-end acoustic transfer functions (ATFs). Extensive simulations were carried out for multi-source scenarios in two different rooms with different reverberation times. To implement the L-GOAT system, a five-microphone linear array was adopted in the far-end room, while
a six-loudspeaker array was utilized in the near-end room. The objective evaluation matrices, including the Perceptual Evaluation of Speech Quality (PESQ), Short-Time Objective Intelligibility (STOI), and the matching errors, were conducted to validate the efficacy of the GOAT systems. The
proposed learning-based approach has demonstrated superior performance compared to a conventional digital signal processing (DSP)-based method.
A study on the perception of refrigerator noise in everyday life
Authors: ATAMER Serkan , KOSOWSKI Piotr , ALTINSOY Ercan
Published: October 2024

Advancements in technology and noise control measures significantly reduced the noise emissions of refrigerators. Despite the achievement of low sound power levels in modern refrigerators, substantial efforts are still dedicated to further minimizing their noise. This initiated an examination
into the need for ongoing activities to reduce noise, given the already minimal noise levels. This study aimed to evaluate the impact of refrigerator noise in everyday life, examining the circumstances and extent of individuals' exposure to noise while exploring their general perception. In
an online survey, attention to refrigerator noise was explored to understand how often respondents can hear refrigerator noise in their daily lives. In addition, questions about the operating conditions of the refrigerator, in particular at the times when participants could hear refrigerator
noise, were also assessed in the survey. Finally, the results of measurements that generalize the extent to which refrigerator noise can exceed background noise in normal rooms were also evaluated in this study.
Soundscape design methodology using a perception model for activity transition in future mobility
Authors: JEON Jin Yong , LEE Haram , YOON Hyowon , SANTIKA Beta Bayu , PARK Dongchul , KIM Juin
Published: October 2024

In the context of Future Mobility, a methodology for soundscape design using a perception model has been developed to facilitate the implementation of performance spaces among various activity transitions. This approach involved evaluating the soundscape and room acoustics of orchestra
performances and solo singing that penetrate the vehicle interior, aimed at comparing with the auditory and visual environments of a concert hall. The performance hall being compared was a large, rectangular concert hall, and the evaluation point was located in the center of the audience.
To investigate audio-visual preferences, variables related to sound pressure level and spatial acoustic quality were initially defined. Following this, in-car human perception in Concert Hall mode was assessed, grounded on indoor acoustic parameters relevant to music listening, encompassing
acoustic satisfaction and audio-visual components. To enhance the poor audio-visual environmental conditions inside the vehicle from a UX perspective, implementations of transparent displays and stereoscopic sound were implemented. The methodology was validated based on the psychophysiological
responses of participants to the audio-visual soundscape factors, aiming for performance enhancement.
Hybrid acoustic modeling: far-field predictions from scanning 3D sound intensity data
Authors: ORSELLI Joseph , XAVIER Robin , JACQMOT Jonathan , FERNáNDEZ COMESAñA Daniel , SCHMAL Jared
Published: October 2024

This research introduces a novel methodology for predicting the far-field acoustic behavior of complex vibro-acoustic sources, utilizing 3D sound intensity data acquired through Scan&Paint 3D's continuous scanning technology. By combining this experimental dataset with the computational
modeling capabilities of the commercial acoustic package Actran, we establish a hybrid method capable of accurately computing noise generated by intricate vibro-acoustic phenomena. The use of a 3D sound intensity probe, in combination with an infrared stereo camera, accelerates the acquisition
of acoustic data across an extensive area. This approach not only delivers detailed insights into the source's near-field acoustic behavior but also provides inputs for the computational model, allowing us to model how the vibrating structure radiates. Extensive validation is performed by
calculating prediction errors across multiple observation points, ensuring high quality far-field predictions. The integration of extensive experimental data with advanced computational modeling marks a significant leap forward in evaluating the far-field impact of complex acoustic sources.
This allows the industrial user to assess the performance of multiple potential mitigation solutions through simulation, quickly, easily, and reliably.
The importance of traffic noise exposure among other exposome variables on children's wellbeing: Results from three studies across three countries
Authors: SPILSKI Jan , LERCHER Peter , VAN KEMPEN Elise , GIEHL Christoph , DZHAMBOV Angel , KLATTE Maria , SCHRECKENBERG Dirk
Published: October 2024

Chronic exposure to traffic noise impairs children's well-being. However, traffic noise exposure is only one aspect with impact on children's wellbeing. In order to better understand the importance of traffic noise in comparison to other influencing factors, the exposome concept can
be useful. The EU project Equal-Life is addressing this issue by investigating the exposome and its influence on children's health and development. In the present paper, we focus on wellbeing which was operationalized as quality of life & happiness and prosocial behavior. Datasets of N
= 3.103 children from three different studies (ALPINE, NORAH, RANCH NL) across three countries (Austria, Germany, the Netherlands) were used. Random forest models provide information on the importance of the physical and social exposome variables for children's wellbeing. We found differences
between the studies with regard to the importance of traffic noise exposure (Lden). and the importance of other exposome variables. Nevertheless, results for non-acoustical variables were similar across studies (socio-demographic and environmental variables). Possible explanations and recommendations
for authorities will be discussed.
A new noise source modelling tool for shooting sheds using novel edge diffraction methodology
Authors: VALDEM Oystein , OLSEN Herold , HENRIKSEN Viggo
Published: October 2024

Shooting ranges may have a shooting shed to protect the shooter against weather and to reduce noise to neighbours. The noise reduction depends on both shielding and reflection effects and can be difficult to measure due to complex surroundings. In this paper, a new tool will be presented
to predict the influence of the shed on the emitted noise. The tool produces a substitute source which models the combined effect of the weapon and the shed, meant for efficient use in regular noise mapping software. It combines advanced edge diffraction methodology for the body of the shed,
with a boundary element solution for minor areas representing openings or absorbers in the shed. With this approach we cover the full spectral range (up to 10 kHz) at low calculation time, with an intended precision comparable to traditional models based on boundary element methods. The tool
is also intended for opposite use, by reciprocity, for instance to model quietness on the backside of a house by a road.
Noise propagation variations over long distances over water
Authors: THYSELL Erik , EGEDAL Rune , SøNDERGAARD Lars Sommer
Published: October 2024

This paper investigates the short temporal variations of noise propagation over a water surface for long distances. Analysis is formed on the results of a measurement campaign for downwind noise propagation over water for elevated sound sources. Noise propagation over water for elevated
noise sources is specifically relevant for offshore wind turbines, near shore wind turbines or wind turbines on land close to large water bodies. The measurement setup is a height-adjustable sound source placed at three different heights 81 m, 50 m and 30 m above ground and microphones positioned
downwind at shore and ~100 m inland at three different distances over water from the sound source ~3 km, ~5 km and ~7 km. The meteorological conditions wind speed, wind direction, atmospheric stability, temperature, humidity, etc. were monitored continuously at both ends of the setup, utilizing
both a tall met mast, a wind profiler and sonic anemometers at multiple heights. The results are used for improving auralisations of noise from offshore wind turbines and offshore wind farms. In addition to this a semi-analytical model for propagation over water is tested.
Recycled plastics based impact noise resilient layer development
Authors: URBáN Daniel , DžOGANOVá Marta , LEDEREROVá Miriam , NEUSSER Maximilian
Published: October 2024

Sustainability and the carbon footprint reduction is commonly associated with recycling and secondary use of materials, for example also in the building construction industry. For decades, experts have been dealing with this topic across the entire spectrum of the development of building
structures. One of the areas where soft recycled materials find suitable application is the area of building acoustics with a focus on impact noise attenuation. This contribution focuses on resilient layers dedicated for lightweight floating floors. This type of flooring is very often used
in the reconstruction of apartments in apartment buildings. There is usually no possibility to realize heavy floating floors or for static reasons or reasons of the structural height of rooms or door openings. The work focuses on the development of floor underlayer mats based on recycled material
in several variants. These were experimentally compared with conventional materials used in practice as the so-called impact sound insulation layers under laminate floors in terms of improving the impact noise insulation as well as the dynamic stiffness and the loss factor.
Construction site environmental pollution management - initiatives, innovation and research
Authors: PREUILH Julien , MAZOYER Thierry , CROS Jean-Florent
Published: October 2024

The management of pollution, and in particular of the impact of noise and vibrations, is very important for construction activities, even more so when it comes to urban construction sites. Indeed, some operations have very significant emissive potential and it is appropriate, for the
proper conduct of the activities, to adopt a certain strategy in order to control the impacts and thus ensure good acceptance of the construction by the neighborhood. Environmental monitoring is the key to achieving this dual objective: prevent pollution and communicate. This paper presents
our innovative approach to localize, identify and report noise pollution on construction sites for efficient noise mitigation. More precisely, usage of acoustic high resolution beamforming is discussed to both identify predominant sources and estimate reliably their contribution to overall
noise pollution captured at a given reference point by à Class I metrological device. By combining the easy-to-deploy ATD directional acoustic sensor with its 10cm aperture microphone array, with video recording for event confirmation and labelling on the highly responsive Cadence interface,
we show how we can solve complex use cases for a wide range of users, from site managers to acoustic experts.
An action-oriented participatory research methodology involving residents, elected representatives and researchers: a case study in Rezé, France
Authors: PETIT Gwendall , ESCAR-OTIN Natalia , GEISLER Elise , AUMOND Pierre , AUDUBERT Philippe , GUIU Claire , BATAILLE Nicolas , CAN Arnaud
Published: October 2024

The management of sound environments is a major challenge for the quality of life of residents (a definition here including city users). Local authorities have regulatory tools at their disposal to manage urban noise pollution, but these are sometimes far removed from the residents'
perceptions. The aim of the SonoRezé project is to build on a citizen science approach, based on a triptych of "Local authorities - Residents - Researchers", working together on the diagnosis and management of urban sound environments in the city of Rezé, in Nantes
metropolitan area. The approach consists in participatory noise measurements using the NoiseCapture mobile application, and the definition and implementation of actions jointly developed by residents, elected representatives and researchers, with the aim of improving the city's sound environments.
The article will present the interdisciplinary and multi-stakeholder methodology involved. Then, two initiated actions will be outlined and discussed: (i) a scientific mediation initiative in schools focusing on the development of perceptual sound maps, (ii) an action on aircraft noise, precising
the methodology involving the three parties used to construct the action, as well as some of the results produced, namely a sensitive map, analyses of measurement data and the production of alternative indicators.
Experience with the high mobility reception plate for source characterization according to EN 15657
Authors: KRUSE Tobias , SCHöPFER Fabian , SCHANDA Ulrich , MAYR Andreas , MAXIMILIAN Dehm
Published: October 2024

EN 12354-5 describes methods for the prediction of noise from technical equipment based on the airborne sound radiation and the structure-borne sound excitation. This paper considers methods to characterize the source in terms of structure-borne-sound (sbs) emission. Laboratory methods
for sbs source characterization are given in EN 15657. In current research and development projects at Rosenheim Technical University of Applied Sciences these methods are applied to fully characterize technical equipment such as heat pumps or ventilation systems. This includes the determination
of the equivalent blocked force, the source single equivalent free velocity and the source single equivalent mobility. EN 15657 describes various methods to determine the required properties. Recent project experience showed that this is essentially necessary because the most suitable method
has to be applied depending on the nature of the technical equipment. This paper presents experiences with indirect measurement methods on the high-mobility plate and the direct measurement method given in EN 15657.
Mapping human voice in urban spaces
Authors: SILIEZAR Jonathan , CAN Arnaud , AUMOND Pierre , CHAPRON Paul
Published: October 2024

Human voice plays a pivotal role as a sound source in urban environments. Despite the plethora of natural sound sources present in urban spaces, human voice often stands out as one of the sound source, exerting a significant influence on the perception and affection of these spaces.
However, compared to other aspects of urban soundscapes, such as traffic noise (air, road, rail), human voice cartography and modelling remains relatively underexplored, with limited historical development and scholarly attention. This research gap led to the deployment of an experimental
protocol in Nantes, France, to produce a comprehensive voice sound map and compare it to perceptual data. This protocol involved the collection of sound level measurements during two distinct measurement campaigns using the NoiseCapture smartphone application, coupled with surveys capturing
perceptual information such as the circumplex circle of affect, perceived presence of sound sources, emergence of sound sources, and variability of the sound environment. Additionally, sound environment simulations were conducted using NoiseModelling. The present paper shows the method used
to evaluate the audibility of human speech in urban spaces. During the presentation, comparisons with perceptual measurements will be presented.
Long term wind turbine sound monitoring
Authors: SCHADY Arthur
Published: October 2024

In the DLR Windpark Wiwaldi, consisting of two wind turbines, extensive measurements of sound and meteorology have been conducted. In the context of long-term wind turbine sound monitoring, the data from such measurements are used to understand and decipher physical effects. This kind
of data suffers sometimes for reliability, because of many changing conditions and situations around the microphone. Therefore, in three different phases the sound of various sources were captured. Before the turbines were installed, initial measurements were made to identify background noise,
followed by additional measurements to assess the impact of installing weather masts on the sound field. Ultimately, the wind turbines were operated reporting the exact state of the turbines (such as rotation speed, pitch, yaw, etc.) to relate to the associated sound levels. This presentation
illustrates how all these measurements are used to create a consistent picture of the noise situation around the wind park depending on specific weather situation and discusses the need of accuracy. We document the limitations and uncertainties associated with the measurements and show these
limitations when interpreting and reporting the results to ensure users in understanding the reliability and confidence level of such data.
Enriching noise environment analysis with spectrally sensitive event detectors: potential and examples from a citizen science project
Authors: DEKONINCK Luc , THOMAS Pieter , BOTTELDOOREN Dick , VAN RENTERGHEM Timothy
Published: October 2024

Enriching datasets with various indicators adds value to sound environment classification and allows analysing the relation between exposure and noise annoyance and sleep disturbance in more depth. This is in line with the WHO guideline report acknowledging the lack of event based indicators
to evaluate the health impact of environmental noise on people. Specific event detectors add value in various ways. Firstly, including spectral windows makes event detection less sensitive to short-term variability of high frequent natural sources. Secondly, a dynamic threshold can adjust
to local backgrounds. The event detection then becomes less sensitive to local features related to the diurnal pattern, the distance to curb side and other. In addition, the detectors can be made sensitive to match the source properties (expected emergence and minimum duration of the event).
In this manuscript, the potential of spectrally sensitive event detectors will be illustrated on real-life data.
Contribution of machine learning and physics-based sound simulations for the optimization of brass instruments
Authors: PETIOT Jean-François , ROATTA Misael , FREOUR VIncent , ARIMOTO Keita
Published: October 2024

Sound simulations by physical model are interesting to transcribe the physics underlying the functioning of a musical instrument. These simulations make it possible to create virtual sounds with a mode of operation representative of the interaction musician/instrument (driving a sound
by the causes that create it). The work consists in studying the contribution of machine learning (ML) methods in the optimization of a musical instrument. The application concerns the brass instruments (trumpets). From a training set of virtual instruments, ML methods are trained to model
the intonation (represented by the equivalent fundamental pitch) and the ease of emission (represented by the threshold pressure obtained by linear stability analysis) of sounds, according to the modal parameters of the input impedance. With the ML models, an optimization with genetic algorithms
is next carried out to improve the intonation and the ease of emission. The last stage of the approach consists in the optimization of the bore of the instrument (optimization of the shape of the leadpipe). The results show that the approach gives promising results: optimal instruments are
actually efficient when re-simulated with the physical model. The manufacturing of an optimal instrument is in progress to confirm the validity of the approach
Relation between measured noise levels and traffic flow
Authors: VENKATARAMAN Siddharth , RUMPLER Romain
Published: October 2024

Road-traffic flow parameters are a critical input to urban noise pollution evaluation frameworks such as CNOSSOS-EU. The accuracy and resolution of the traffic flow improves the quality of the noise exposure assessment. Highly resolved traffic flow within an urban network is difficult
to reliably measure or predict. The quality and availability of such traffic information may be improved using data from low-cost noise sensors that are mounted beside representative segments of the road network. A model is presented, which relates the noise levels measured at a single noise
sensor with the local traffic flow conditions. The noise data is obtained from a noise sensor mounted alongside a road, which is part of a test-bed in Stockholm, Sweden. The local traffic flow is obtained from commercial vehicle-counting sensors mounted alongside the noise sensor. Effect of
seasonality is observed when comparing models trained on different subsets of the training data. The effect of seasonality on the noise levels is investigated.