Article
Acoustics
Johann Kay Ann Tan, Yoshimi Hasegawa, Siu-Kit Lau
Summary: The study aims to develop a comprehensive categorization scheme for environmental noise and sounds in urban cities. The soundscape approach, considering sounds as 'resources', has proven to be promising in addressing noise pollution. The study identified 61 commonly occurring sounds in outdoor urban environments and provided alternate categorization schemes for different spaces, aiding soundscape researchers and urban soundscape management.
Article
Acoustics
Pierangelo Libianchi, Elena Shabalina, Mark Kelly, Jonas Brunskog, Finn Agerkvist
Summary: This paper examines the impact of wind speed modeling errors on the sound field close to the ground. The commonly used logarithmic wind speed profile underestimates the wind speed in neutral conditions. Simulation results show that the difference in wind speed introduces a phase error that increases with distance, and the underestimation of wind speed also leads to an underprediction of downward refracted energy.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Environmental Sciences
David Montes Gonzalez, Juan Miguel Barrigon Morillas, Guillermo Rey-Gozalo
Summary: Research combining objective variables measurement with surveys on perception of noise on city streets helps to understand the impact of urban noise on the population and improve the environment. This paper evaluates specific effects of noise on pedestrians in urban environments where road traffic is the main source of sound, using in situ surveys and objective variables. The results show significant relationships between the effects of noise and perceptions of how noisy urban environments are with variables such as building height, road category, and temperature.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Acoustics
Timothy Van Renterghem, Kirill Horoshenkov, Jordan A. Parry, Duncan P. Williams
Summary: This paper fills a knowledge gap by statistically analyzing the atmospheric effects on sound pressure levels, finding that ground type and atmospheric state significantly impact the probability distribution of sound pressure levels. Under certain conditions, distributions can be remarkably similar, highlighting the increasing importance of considering meteorological effects when predicting sound pressure level distributions.
Article
Acoustics
Kuen Wai Ma, Cheuk Ming Mak, Hai Ming Wong
Summary: A public urban space plays a crucial role in urban planning, providing citizens with opportunities for various activities. This study explores how environmental sound quality influences visitors' soundscape perceptions and preferences. Results show that visitors are more concerned with maximum sound levels, prefer quieter and more pleasant soundscapes, and have a higher preference for natural sounds.
Article
Environmental Sciences
M. C. Sanjana, G. Latha, G. Raguraman
Summary: The study recorded sound pressure levels at Kongsfjorden, Arctic using an Automated Noise Measurement System, analyzing the acoustic characteristics and noise propagation of vessels. It predicted the radiated acoustic field from vessel transits, as well as the propagation and transmission loss of noise in the fjord, calculating the impact range and levels of shipping noise.
MARINE POLLUTION BULLETIN
(2021)
Article
Physics, Applied
G. J. Chaplain, R. V. Craster
Summary: Selective diffraction phenomenon is extended to in-plane elastic waves by designing surface corrugated periodic laminates incorporating crystal momentum transfer. The resulting elastic grating couplers possess additional capabilities to split and independently redirect compressional and shear-vertical elastic waves through selective negative refraction. Obtaining isofrequency contours via a non-dimensionalized transfer matrix method aids in the design paradigm and interpretation.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Analytical
Elena Ascari, Mauro Cerchiai, Luca Fredianelli, Gaetano Licitra
Summary: Low-noise surfaces have been widely used to reduce noise, and methods like CPX and SPB are developed to assess their effectiveness. However, CPX is source oriented and SPB requires special settings in urban environments. This paper presents a new method called U-SPB, which combines unattended measurements and laboratory processing to extend the evaluation of low-noise laying in urban contexts.
Article
Engineering, Mechanical
Liang Yu, Longjing Yu, Jiaqi Wang, Ran Wang, Zhifei Chen
Summary: Helicopter rotor aerodynamic noise research has become essential as helicopters' reliability and comfort requirements have increased. The lack of a generally accepted formal definition of cyclostationarity based on basic aerodynamic theory and wave propagation model limits the application of cyclostationary methods for analyzing helicopter rotor aerodynamic noise. This paper proposes a formal cyclostationary modeling process based on aerodynamic and wave propagation theory, aiming for subsequent cyclostationary signal processing.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Environmental Sciences
Jon-Paul Faulkner, Enda Murphy
Summary: This study utilizes the calculation procedures outlined in the European Union's Environmental Noise Directive and the new CNOSSOS-EU method to conduct a case study on the quantification of harmful effects caused by environmental noise in Ireland. The results indicate a significant number of cases of ischemic heart disease, high annoyance, and high sleep disturbance attributed to transportation noise in Ireland.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Acoustics
Didier Dragna, Ariane Emmanuelli, Sebastien Ollivier, Philippe Blanc-Benon
Summary: This study investigates the propagation of sonic booms over urban areas through numerical simulations based on the Euler equations. Two types of boom waves, namely the classical N-wave and the low-boom wave, are examined. Ten urban geometries, generated based on the local climate zone classification, are considered representative of urban forms. The study finds that the aspect ratio of urban canyons significantly affects the noise levels and peak pressure, especially for the N-wave, with compact geometries exhibiting higher variability between canyons. Open geometries, on the other hand, show similar parameter evolution to isolated buildings. A statistical analysis of noise levels in urban canyons reveals that the median perceived noise levels differ by less than 1 dB from that of flat ground, with greater variations observed in open geometries compared to compact ones. Additionally, low-frequency oscillations associated with resonant modes of the canyons are observed, with significant variations in amplitude, frequency, and decay rate among different canyons.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Acoustics
Natalia Sidorovskaia, Kun Li
Summary: This study describes the primary acoustic field of a standard seismic survey source array based on calibrated data collected in the Gulf of Mexico. It calculates acoustic metrics relevant to potential impacts on marine life and proposes models for predicting and assessing the acoustic fields of source arrays.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Optics
M. Bakunov, A. Shirokova, M. A. Kurnikov, A. Maslov
Summary: By utilizing a more general Lorentz medium model, this study investigates the realms of applicability of the traditional temporal boundary model in different scenarios, revealing a dependency of continuity conditions and energy relations on the nonstationarity mechanism and the ratio between the rate of nonstationarity and characteristic frequencies in the system.
Article
Physics, Applied
Qinhong Li, Xiao Xiang, Li Wang, Yingzhou Huang, Xiaoxiao Wu
Summary: The emergence of acoustic metamaterials in the last two decades has provided new possibilities for controlling sound waves. However, a ventilated sound switch that can achieve both satisfying sound transmission and ventilation has not been proposed until now. In this work, a topological ventilated sound switch based on the one-dimensional acoustic Su-Schrieffer-Heeger model is demonstrated, which can switch the sound on or off while maintaining desired ventilation performance.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Mechanical
Hui Li, Xinbiao Xiao, Xiaozhen Sheng
Summary: In this study, a modeling approach is proposed to predict the influence of turbulent boundary layers (TBLs) on sound propagation. The ray tracing method is employed to track the evolution of sound waves through TBLs, and the equivalent phase speed and Doppler factor are obtained to extend traditional methods for predicting sound distribution in inhomogeneous flow media. Validation cases show good agreement with analytical solutions and finite element simulations, demonstrating the effectiveness and efficiency of the proposed approach.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Acoustics
Huiqing Wang, Maarten Hornikx
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2020)
Article
Acoustics
Huiqing Wang, Jieun Yang, Maarten Hornikx
Article
Acoustics
Chang Liu, Fotis Georgiou, Maarten Hornikx
Summary: Vegetated roof systems can help mitigate traffic noise by acting as absorbers. The properties of substratum and plant coverage are crucial for the acoustic absorption of vegetated roofs. Most studies on acoustic absorption are based on laboratory experiments or numerical models, with limited research focusing on in-situ measurement for impedance prediction.
Article
Acoustics
Huiqing Wang, Matthias Cosnefroy, Maarten Hornikx
Summary: This paper presents a numerical scheme with arbitrary order of accuracy in both space and time for transient acoustic simulations. By combining the nodal discontinuous Galerkin method and the Taylor series integrator (TSI), this scheme aims to achieve consistent high-order accuracy. The use of a local time-stepping (LTS) algorithm enhances computational efficiency and ensures correct communications between domains with different time step sizes.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Engineering, Manufacturing
Tomasz G. Zielinski, Kamil C. Opiela, Piotr Pawlowski, Nicolas Dauchez, Thomas Boutin, John Kennedy, Daniel Trimble, Henry Rice, Bart Van Damme, Gwenael Hannema, Rafal Wrobel, Seok Kim, Shahrzad Ghaffari Mosanenzadeh, Nicholas X. Fang, Jieun Yang, Baltazar Briere de la Hosseraye, Maarten C. J. Hornikx, Edouard Salze, Marie-Annick Galland, Rene Boonen, Augusto Carvalho de Sousa, Elke Deckers, Mathieu Gaborit, Jean-Philippe Groby
ADDITIVE MANUFACTURING
(2020)
Article
Acoustics
Fotis Georgiou, Maarten Hornikx, Armin Kohlrausch
Summary: The paper presents a methodology for the auralization of car pass-by based on measured binaural impulse responses, and a listening test revealed that increasing the angular spacing between the discrete source positions affects the perception of the auralizations. The discrimination performance of subjects was significantly better in the scenario with buildings compared to the test conditions without buildings.
Article
Acoustics
Baltazar Briere de la Hosseraye, Maarten Hornikx, Jieun Yang
Summary: The study proposes a characterization method that combines in-situ pressure-velocity measurement with a model fitting procedure using the Delany-Bazley-Miki impedance model for porous materials. This method provides accurate measurement of material acoustical properties within a given frequency range.
Article
Psychology, Multidisciplinary
Lore Thaler, L. J. Norman, H. P. J. C. De Vos, D. Kish, M. Antoniou, C. J. Baker, M. C. J. Hornikx
Summary: This study reports novel empirical results from a psychophysical experiment testing the echolocation abilities of nine blind adult experts. The findings show that these experts had better accuracy in localizing a target when it was placed at 45 degrees off to the side, and they used lower intensity emissions in such cases. An explanation is provided based on binaural-intensity signals, which change more rapidly around 45 degrees. The surprising result suggests that human echolocation and source hearing rely on different acoustic cues, indicating a more complex nature of human spatial hearing.
PSYCHOLOGICAL SCIENCE
(2022)
Article
Acoustics
Chang Liu, Fotis Georgiou, Maarten Hornikx
Summary: Urban vegetation, such as vegetated roofs, plays a crucial role in restoring ecological balance, providing pleasant environments, and reducing urban noise levels. This study proposes a unique multiple-geometry approach for determining the acoustic impedance model parameters of vegetated roofs.
Review
Environmental Sciences
Michail Evangelos Terzakis, Maud Dohmen, Irene van Kamp, Maarten Hornikx
Summary: This systematic literature review investigates the objective noise indicators related to various noise sources and their predictions of non-auditory health effects in children. The study finds significant associations between noise exposure and children's psychophysiological, cognitive development, mental health, and sleep effects.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Review
Environmental Sciences
Maud Dohmen, Ella Braat-Eggen, Astrid Kemperman, Maarten Hornikx
Summary: Environmental noise has various effects on our daily functioning, including cognitive, motivational, and emotional effects. Coping with noise and cognitive resources play a crucial role in our task performance under noisy conditions. Failed coping may lead to cognitive fatigue, learned helplessness, and altered motivation to persist in a task. While the effects of irrelevant sounds on cognition in children are well-established, there is limited research on the framework of learned helplessness, particularly in children. This review aims to assess the interaction effects of the sound environment on cognition and learned helplessness in children and young adults up to the age of 21. Eight included papers show evidence for individual relations between environmental noise, cognition, and helplessness in children aged 8-13, but none examine the possible interaction. However, based on the study designs, it is hypothesized that cognitive fatigue may play a role in the interaction. Further research is needed with the same methods in different age groups to better understand the interaction between cognition and learned helplessness in relation to the sound environment.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2023)
Article
Acoustics
Huiqing Wang, Maarten Hornikx
Summary: Modeling acoustic boundary conditions using numerical frameworks is crucial for accurate room acoustic simulations. In this study, the discontinuous Galerkin (DG) method is applied to model extended reacting boundaries of porous absorbers covered by thin materials. The proposed framework utilizes equivalent fluid models and a domain decomposition methodology to depict the acoustic properties of porous materials. It also employs an auxiliary differential equation approach for time convolution calculations, resulting in a unified hyperbolic form for the governing equations and consistent upwind numerical flux formulation. Validations and case studies demonstrate the effectiveness of this approach in achieving high-order convergence and broadband accuracy.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Environmental Sciences
Kerstin Persson Waye, Jesper Love, Peter Lercher, Angel M. Dzhambov, Maria Klatte, Dirk Schreckenberg, Christin Belke, Larisa Leist, Gordana Ristovska, Sonja Jeram, Katja M. Kanninen, Jenny Selander, Arzu Arat, Thomas Lachmann, Charlotte Clark, Dick Botteldooren, Kim White, Jordi Julvez, Maria Foraster, Jaakko Kaprio, Gabriele Bolte, Achilleas Psyllidis, John Gulliver, Hendriek Boshuizen, Alessandro Bozzon, Janina Fels, Maarten Hornikx, Peter van den Hazel, Miriam Weber, Marco Brambilla, Ella Braat-Eggen, Irene Van Kamp, Natalia Vincens, Equal life Sci Team
Summary: Mental disorders among children and adolescents are a significant global challenge. The exposome framework provides opportunities to understand the causes and processes related to mental health and cognitive development. This paper highlights the importance of a child perspective and the vulnerability of children to environmental exposures. It also emphasizes the interplay between structure and agency.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Irene van Kamp, Kerstin Persson Waye, Katja Kanninen, John Gulliver, Alessandro Bozzon, Achilleas Psyllidis, Hendriek Boshuizen, Jenny Selander, Peter van den Hazel, Marco Brambilla, Maria Foraster, Jordi Julvez, Maria Klatte, Sonja Jeram, Peter Lercher, Dick Botteldooren, Gordana Ristovska, Jaakko Kaprio, Dirk Schreckenberg, Maarten Hornikx, Janina Fels, Miriam Weber, Ella Braat-Eggen, Julia Hartmann, Charlotte Clark, Tanja Vrijkotte, Lex Brown, Gabriele Bolte
Summary: The Equal-Life project aims to study the impact of combined exposures on children's mental health and cognitive development, by integrating different aspects of the child's environment and looking at supportive environments for child development. The project utilizes a variety of data sources, including GIS-based environmental indicators and omics approaches, to form a comprehensive early-life exposome. Through statistical analysis and machine learning models, Equal-Life seeks to provide insights into the effects of physical and social exposures on children's development over time.
ENVIRONMENTAL EPIDEMIOLOGY
(2022)
Article
Construction & Building Technology
Ella Braat-Eggen, Jikke Reinten, Maarten Hornikx, Armin Kohlrausch
Summary: The study found that different sound scenarios did not significantly impact students' performance on reading comprehension and mental arithmetic tasks, but had a significant effect on performance on the logical reasoning task. It also had a significant impact on students' self-estimated performance and perceived disturbance, with the reading comprehension task being the most disturbed.
FRONTIERS IN BUILT ENVIRONMENT
(2021)
Article
Construction & Building Technology
Parth Bansal, Steven Jige Quan
Summary: This study investigates the relationship between urban form and canopy layer urban heat island (CUHI) using a relatively large sample of microclimate sensors in Seoul, Korea. The study compares different statistical models and finds that the spatially explicit gradient boosting decision tree (GBDT) model has the highest accuracy. The study also shows that the effect of urban form on CUHI varies at different time instances during the day. These findings provide valuable insights for planners to understand the complexity of urban climate and reduce CUHI magnitude.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Miaomiao Liu, Salah Almazmumi, Pinlu Cao, Carlos Jimenez-bescos, John Kaiser Calautit
Summary: Windcatchers provide effective low-energy ventilation and summer passive cooling in temperate climates. However, their use in winter is limited due to significant ventilation heat loss and potential discomfort. This study evaluates the applicability of windcatchers in low-temperature conditions, highlighting the need for control strategies to reduce over-ventilation and the integration of heat recovery or thermal storage to enhance winter thermal conditions.
BUILDING AND ENVIRONMENT
(2024)
Review
Construction & Building Technology
Behrouz Nourozi, Aneta Wierzbicka, Runming Yao, Sasan Sadrizadeh
Summary: This article presents a systematic review of ventilation solutions in hospital wards, aiming to enhance pathogen removal performance while maintaining patient and healthcare staff comfort using air-cleaning techniques. The study reveals the importance of proper ventilation systems in reducing infection risk and adverse effects of cross-contamination.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhen Yang, Weirong Zhang, Hongkai Liu, Weijia Zhang, Mingyuan Qin
Summary: The study examines the influence of personalized local heating on the thermal comfort of occupants in old residential buildings. The findings reveal that personalized local heating can increase the overall thermal sensation of occupants, but only a few methods are effective in enhancing thermal comfort. The chosen heating methods and background temperature affect the participants' selection of heating parts.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Hong Cheng, Dan Norback, Huilin Zhang, Liu Yang, Baizhan Li, Yinping Zhang, Zhuohui Zhao, Qihong Deng, Chen Huang, Xu Yang, Chan Lu, Hua Qian, Tingting Wang, Ling Zhang, Wei Yu, Juan Wang, Xin Zhang
Summary: The home environment and sick building syndrome (SBS) symptoms in five southern Chinese cities have been studied over time. The study found a decrease in asthma prevalence and an increase in allergic rhinitis. Cockroaches, rats, mice, mosquitoes or flies were identified as consistent biological risk factors for SBS symptoms, while redecoration, buying new furniture, and traffic air pollution were identified as other risk factors.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Chaojie Xing, Zhengtao Ai, Zhiwei Liu, Cheuk Ming Mak, Hai Ming Wong
Summary: This study experimentally investigated the emission characteristics of droplets around the mouth during dental treatments. The results showed that the peak mass fraction of droplets occurs within the size range of 20 μm to 100 μm, and droplets with a diameter less than 200 μm account for over 80% of the mass fraction. The dominant emission direction of droplets is towards the dummy's head and chest, forming an approximately cone shape.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhijian Liu, Zhe Han, Lina Hu, Chenxing Hu, Rui Rong
Summary: This study compared the effects of different respiratory behaviors on the distribution of aerosols in a ward and the risk of infection for healthcare workers using numerical simulation. It was found that talking in the ward significantly increased aerosol concentrations, particularly short periods of talking. Wards designed with side-supply ventilation had lower overall infection risk. Talking alternately between healthcare workers and patients slightly extended the impact time of aerosols.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Yan, Mengyuan Kang, Haodong Zhang, Zhiwei Lian, Xiaojun Fan, Chandra Sekhar, Pawel Wargocki, Li Lan
Summary: In a high-density city, opening windows for sleep may lead to increased indoor temperature, higher PM2.5 concentration, and noise disturbance, which can negatively impact sleep quality.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Bai, Liang Liu, Kai Liu, Shuai Yu, Yifan Shen, Di Sun
Summary: This study developed a non-intrusive personal thermal comfort model using machine learning techniques combined with infrared facial recognition. The results showed that the ensemble learning models perform better than traditional models, and the broad learning model has a higher prediction precision with lower computational complexity and faster training speed compared to deep neural networks. The findings provide a reference for optimizing building thermal environments.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yue Lei, Zeynep Duygu Tekler, Sicheng Zhan, Clayton Miller, Adrian Chong
Summary: Mixed-mode ventilation is a promising solution for achieving energy-efficient and comfortable indoor environments. This study found that occupants can thermally adapt when switching between natural ventilation (NV) and air-conditioning (AC) modes within the same day, with the adaptation process stabilizing between 35 to 45 minutes after the mode switch. These findings are important for optimizing thermal comfort in mixed-mode controls, considering the dynamic nature of thermal adaptation.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Nan Mo, Jie Han, Yingde Yin, Yelin Zhang
Summary: This study develops a method based on the LCZ framework for a comprehensive evaluation of urban-scale heat island effects, considering the impact of geographic factors on LST. The results show that Guilin's geomorphological conditions lead to abnormal heat island effects during winter, and the cooling effects of mountains and water bodies vary seasonally in different built areas, with LCZ 2 exhibiting the strongest cooling effect.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Tunga Salthammer
Summary: Monitoring the potential formaldehyde emission of wood-based materials through test chamber investigations has significantly contributed to reducing indoor formaldehyde concentrations. However, the different methodologies used in these procedures prevent direct result comparison. Empirical models for converting formaldehyde steady-state concentrations based on temperature, humidity, air change rate, and loading were developed in the 1970s and have been modified to accommodate the development of lower-emitting materials. Formaldehyde emissions from wood-based materials are complex and require nonlinear regression tools for mathematical analysis.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Katarina Stebelova, Katarina Kovacova, Zuzana Dzirbikova, Peter Hanuliak, Tomas Bacigal, Peter Hartman, Andrea Vargova, Jozef Hraska
Summary: This study investigated the impact of reduced short-wavelength light on the hormone melatonin metabolite 6-sulfatoxymelatonin (u-sMEL) and examined the association between previous day's light exposure and u-sMEL. It was found that reducing short-wavelength light during the day did not change the concentration of u-sMEL. Personal photopic illuminance was positively correlated with u-sMEL in the reference week. The illuminance had a significant impact on u-sMEL, as shown by the evaluation of the mean of all three urine samples. However, this correlation was not found in the experimental week.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Ruoxin Xiong, Ying Shi, Haoming Jing, Wei Liang, Yorie Nakahira, Pingbo Tang
Summary: This study proposes a data-model integration method to identify and calibrate uncertainties in machine learning models, leading to improved thermal perception predictions. The method utilizes the Multidimensional Association Rule Mining algorithm to identify biased human responses and enhances prediction accuracy and reliability. The study also evaluates different calibration techniques and discovers their potential in enhancing prediction reliability.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Beichao Hu, Zeda Yin, Abderrachid Hamrani, Arturo Leon, Dwayne McDaniel
Summary: This paper introduces an innovative super-resolution approach to model the air flow and temperature field in the cold aisle of a data center. The proposed method reconstructs a high-fidelity flow field by using a low-fidelity flow field, significantly reducing the computational time and enabling real-time prediction.
BUILDING AND ENVIRONMENT
(2024)
