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Urban greenspace soundscapes can contribute to the restorative effects that nature provides for the psychological and emotional health of people when certain conditions are met. The main objective of this paper is to propose practical criteria to help planners and managers in the design, development and preservation of urban greenspaces whose soundscapes may contribute to the renewal of health. Systematic literature review informed a conceptual potential Health Restoration Soundscapes (HeReS) model, based on five conditions: (1) Naturalness, (2) Sound Levels, (3) Perceived Sound Sources, (4) Soundscape Assessment, and (5) Sensescape Coherence and proposed Health Restoration Soundscapes Criteria (HeReS-C), for HeReS evaluation in urban green areas. The HeReS-C were applied in 21 sites in Argentina, Sweden, and Chile. General results are provided for all 21 sites, along with three in-depth profiles of HeReS-C applications that provide case studies across a range of resulting HeReS-C scenarios, including sites that meet the HeReS-C criteria, those that do not, and sites that could qualify in the future, if appropriate management measures are taken. HeReS-C showed to be a promising tool for the recognition of potential health-restoring soundscapes in urban greenspaces; informing their design and management to favor the well-being and health of the population.
Pablo Kogan; Trace Gale; Jorge P. Arenas; Claudia Arias. Development and application of practical criteria for the recognition of potential Health Restoration Soundscapes (HeReS) in urban greenspaces. Science of The Total Environment 2021, 793, 148541 .
AMA StylePablo Kogan, Trace Gale, Jorge P. Arenas, Claudia Arias. Development and application of practical criteria for the recognition of potential Health Restoration Soundscapes (HeReS) in urban greenspaces. Science of The Total Environment. 2021; 793 ():148541.
Chicago/Turabian StylePablo Kogan; Trace Gale; Jorge P. Arenas; Claudia Arias. 2021. "Development and application of practical criteria for the recognition of potential Health Restoration Soundscapes (HeReS) in urban greenspaces." Science of The Total Environment 793, no. : 148541.
Fuzzy initial value problems describing classical mechanical vibrations are the focus of this paper. In particular, this work considers systems described by nth-order linear ordinary differential equations whose initial conditions are uncertain and given by interactive fuzzy numbers. The concept of interactivity arises from the concept of joint possibility distribution (J). An approach based on the sup-J extension principle, which is a generalization of Zadeh’s extension principle, is presented. This theory is applied to two major examples of oscillatory systems: the forced vibration of an uncoupled mass-spring-damper system and the free vibration of a coupled undamped mass-spring system. In both cases, we have that the solution via sup-J extension, where the fuzzy initial conditions are given by linearly correlated fuzzy numbers, is contained in the solution via Zadeh’s extension.
Daniel Eduardo Sánchez; Vinícius F. Wasques; Jorge P. Arenas; Estevão Esmi; Laécio Carvalho de Barros. On interactive fuzzy solutions for mechanical vibration problems. Applied Mathematical Modelling 2021, 96, 304 -314.
AMA StyleDaniel Eduardo Sánchez, Vinícius F. Wasques, Jorge P. Arenas, Estevão Esmi, Laécio Carvalho de Barros. On interactive fuzzy solutions for mechanical vibration problems. Applied Mathematical Modelling. 2021; 96 ():304-314.
Chicago/Turabian StyleDaniel Eduardo Sánchez; Vinícius F. Wasques; Jorge P. Arenas; Estevão Esmi; Laécio Carvalho de Barros. 2021. "On interactive fuzzy solutions for mechanical vibration problems." Applied Mathematical Modelling 96, no. : 304-314.
Noise pollution must be considered to achieve sustainable cities because current levels of exposure to environmental noise are a considerable risk to the health and quality of life of citizens. Urban features and sound levels were registered in 150 streets in the Chilean cities of Talca and Valdivia to analyze the relationship between both types of variables. Urban variables related to street location, urban land use, street geometry, road traffic control, and public and private transportation showed very significant correlations with the noise levels, and multiple regression models were developed from these variables for each city. Models using only urban variables in Valdivia and Talca explained 71% and 73%, respectively, of the variability of noise. The prediction error was similar in the different types of urban roads and did not exhibit significant differences between models developed in different cities. The urban models developed in one city could, therefore, be used in other similar cities. Considering the usefulness of these variables in urban planning, these models can be a useful tool for urban planners and decision-makers to implement action plans regarding noise pollution.
Guillermo Rey Gozalo; Enrique Suárez; Alexandra L. Montenegro; Jorge P. Arenas; Juan Miguel Barrigón Morillas; David Montes González. Noise Estimation Using Road and Urban Features. Sustainability 2020, 12, 9217 .
AMA StyleGuillermo Rey Gozalo, Enrique Suárez, Alexandra L. Montenegro, Jorge P. Arenas, Juan Miguel Barrigón Morillas, David Montes González. Noise Estimation Using Road and Urban Features. Sustainability. 2020; 12 (21):9217.
Chicago/Turabian StyleGuillermo Rey Gozalo; Enrique Suárez; Alexandra L. Montenegro; Jorge P. Arenas; Juan Miguel Barrigón Morillas; David Montes González. 2020. "Noise Estimation Using Road and Urban Features." Sustainability 12, no. 21: 9217.
Technological advances in materials science, manufacturing processes, chemistry and nanoscience have led to enormous developments in innovatively engineered materials over recent decades. Among them, sustainable acoustic materials have helped to improve acoustical comfort in built environments, and their use is rapidly growing in the architecture, automotive, aerospace and construction industries. These materials are manufactured through a responsible interaction with the environment in order to avoid a depletion or degradation of the natural resources, and to allow for long-term environmental quality. This Special Issue reports on some research studies on membrane absorbers and fibrous materials of natural origin that can be sustainable alternatives to traditional acoustic materials.
Jorge Arenas; Kimihiro Sakagami. Sustainable Acoustic Materials. Sustainability 2020, 12, 6540 .
AMA StyleJorge Arenas, Kimihiro Sakagami. Sustainable Acoustic Materials. Sustainability. 2020; 12 (16):6540.
Chicago/Turabian StyleJorge Arenas; Kimihiro Sakagami. 2020. "Sustainable Acoustic Materials." Sustainability 12, no. 16: 6540.
Research on sound-absorbing materials made of natural fibers is an emerging area in sustainable materials. In this communication, the use of raw esparto grass as an environmentally friendly sound-absorbing material is explored. Measurements of the normal-incidence sound-absorption coefficient and airflow resistivity of three different types of esparto from different countries are presented. In addition, the best-fit coefficients for reasonable prediction of the sound-absorption performance by means of simple empirical formulae are reported. These formulae require only knowledge of the airflow resistivity of the fibrous material. The results presented in this paper are an addition to the characterization of available natural fibers to be used as alternatives to synthetic ones in the manufacturing of sound-absorbing materials.
Jorge Arenas; Romina Del Rey; Jesús Alba; Roberto Oltra. Sound-Absorption Properties of Materials Made of Esparto Grass Fibers. Sustainability 2020, 12, 5533 .
AMA StyleJorge Arenas, Romina Del Rey, Jesús Alba, Roberto Oltra. Sound-Absorption Properties of Materials Made of Esparto Grass Fibers. Sustainability. 2020; 12 (14):5533.
Chicago/Turabian StyleJorge Arenas; Romina Del Rey; Jesús Alba; Roberto Oltra. 2020. "Sound-Absorption Properties of Materials Made of Esparto Grass Fibers." Sustainability 12, no. 14: 5533.
In this paper, the standardized characterization of nanofibrous membranes used to coat three porous bulk acoustical materials (melamine foam, a polyester textile, and an MDF perforated panel) is presented. The membranes were manufactured from recyclable Polyamide 6 (PA6) and water-soluble polyvinyl alcohol (PVA) using the needleless electrospinning technique. This resulted in very thin membranes that had high porosity and very high airflow resistivity. The membranes were collected in a high-permeability nonwoven substrate. Measured results in both an impedance tube and a reverberation room showed significant improvements in the sound absorption performance of the bulk materials after incorporating the nanofibrous layer. The application of the membranes on the surface of a traditional air-backed perforated panel also improved the sound absorption, exhibiting a broad peak of sound absorption in the low-frequency range. This was particularly true when the membrane area weight was increased. It is concluded that these materials, manufactured as described in this paper, can be alternatives to glass, mineral, and ceramic fibrous materials, which have high carbon footprints.
Tomáš Ulrich; Jorge P. Arenas. Sound Absorption of Sustainable Polymer Nanofibrous Thin Membranes Bonded to a Bulk Porous Material. Sustainability 2020, 12, 2361 .
AMA StyleTomáš Ulrich, Jorge P. Arenas. Sound Absorption of Sustainable Polymer Nanofibrous Thin Membranes Bonded to a Bulk Porous Material. Sustainability. 2020; 12 (6):2361.
Chicago/Turabian StyleTomáš Ulrich; Jorge P. Arenas. 2020. "Sound Absorption of Sustainable Polymer Nanofibrous Thin Membranes Bonded to a Bulk Porous Material." Sustainability 12, no. 6: 2361.
An effective way to reduce impact sound in buildings is to install a floating floor consisting of a floating slab separated from the structural slab by a continuous viscoelastic layer. Although a considerable amount of work has been reported on nanomaterials in the past decades, the impact sound reduction performance of polymer/clay nanocomposites has not been specifically addressed in the literature. In this paper, we report the synthesis and characterization of a nanocomposite made of thermoplastic polyurethane (TPU) with laponite clay filler and its potential use for reducing impact sound in floating floor technology. Samples were prepared with laponite content ranged between 0.5 and 10 wt% for each nanocomposite synthesized using a solvent solution mixing process. The characterization of the nanocomposites confirmed that the clay content in the TPU matrix has significant impact on the viscoelastic properties. In particular, the incorporation of 5–10 wt% laponite clay in the TPU matrix increased mechanical damping and reduced dynamic stiffness as compared to the pristine TPU. The experimental results were compared with a constitutive model that extends the Cremer-Vér model. The results predicted a considerable improvement of the impact sound insulation at the resonance frequency when the nanocomposite is used as a continuous viscoelastic layer supporting the floating slab. These results were attained without significantly increasing the total weight of the floating layer.
Jorge P. Arenas; Jose L. Castaño; Loreto Troncoso; Maria L. Auad. Thermoplastic polyurethane/laponite nanocomposite for reducing impact sound in a floating floor. Applied Acoustics 2019, 155, 401 -406.
AMA StyleJorge P. Arenas, Jose L. Castaño, Loreto Troncoso, Maria L. Auad. Thermoplastic polyurethane/laponite nanocomposite for reducing impact sound in a floating floor. Applied Acoustics. 2019; 155 ():401-406.
Chicago/Turabian StyleJorge P. Arenas; Jose L. Castaño; Loreto Troncoso; Maria L. Auad. 2019. "Thermoplastic polyurethane/laponite nanocomposite for reducing impact sound in a floating floor." Applied Acoustics 155, no. : 401-406.
Eco-materials employed to reduce noise are used either independently or as components of complex composite materials, which are a growing area of research. These eco-materials have the potential to be used as high-performance sound-absorbing noise isolators in a number of applications in areas such as transportation, architectural, industrial, and construction. Public concern about the environmental impact of transportation is leading to reduced fuel consumption and the use of recycled materials. These are clearly related to the reduction of weight, extending durable years. Currently, the concept of “green” building materials is used in practice in several European countries. In addition, public awareness and concern about the negative effects of pollution have led consumers to favor environmentally friendly materials, less contaminating processes, and recycled products. This chapter discusses eco-materials produced for the specific purpose of reducing noise. After an introduction to the subject, a section is devoted to the assessment of sustainable materials. Then, the fundamentals of the sound absorption, airborne sound insulation, and impact sound insulation properties of acoustical eco-materials are presented. The following section reviews common acoustical eco-materials, including those using natural fibers instead of synthetic ones, recycled fibers and surplus materials, advanced mix and composite eco-materials designed to provide better performance and produce lightweight materials that help in reducing fuel consumption and greenhouse gas emissions to the atmosphere, and, finally, green walls and roofs used on top of some buildings. All these eco-materials provide an alternative to chemical building materials, polymers, and other artificial non-sustainable materials.
Jorge P. Arenas; Francesco Asdrubali. Eco-materials with Noise Reduction Properties. Handbook of Ecomaterials 2019, 3031 -3056.
AMA StyleJorge P. Arenas, Francesco Asdrubali. Eco-materials with Noise Reduction Properties. Handbook of Ecomaterials. 2019; ():3031-3056.
Chicago/Turabian StyleJorge P. Arenas; Francesco Asdrubali. 2019. "Eco-materials with Noise Reduction Properties." Handbook of Ecomaterials , no. : 3031-3056.
Urban soundscapes are dynamic and complex multivariable environmental systems. Soundscapes can be organized into three main entities containing the multiple variables: Experienced Environment (EE), Acoustic Environment (AE), and Extra-Acoustic Environment (XE). This work applies a multidimensional and synchronic data-collecting methodology at eight urban environments in the city of Córdoba, Argentina. The EE was assessed by means of surveys, the AE by acoustic measurements and audio recordings, and the XE by photos, video, and complementary sources. In total, 39 measurement locations were considered, where data corresponding to 61 AE and 203 EE were collected. Multivariate analysis and GIS techniques were used for data processing. The types of sound sources perceived, and their extents make up part of the collected variables that belong to the EE, i.e. traffic, people, natural sounds, and others. Sources explaining most of the variance were traffic noise and natural sounds. Thus, a Green Soundscape Index (GSI) is defined here as the ratio of the perceived extents of natural sounds to traffic noise. Collected data were divided into three ranges according to GSI value: 1) perceptual predominance of traffic noise, 2) balanced perception, and 3) perceptual predominance of natural sounds. For each group, three additional variables from the EE and three from the AE were applied, which reported significant differences, especially between ranges 1 and 2 with 3. These results confirm the key role of perceiving natural sounds in a town environment and also support the proposal of a GSI as a valuable indicator to classify urban soundscapes. In addition, the collected GSI-related data significantly helps to assess the overall soundscape. It is noted that this proposed simple perceptual index not only allows one to assess and classify urban soundscapes but also contributes greatly toward a technique for separating environmental sound sources.
Pablo Kogan; Jorge P. Arenas; Fernando Bermejo; María Hinalaf; Bruno Turra. A Green Soundscape Index (GSI): The potential of assessing the perceived balance between natural sound and traffic noise. Science of The Total Environment 2018, 642, 463 -472.
AMA StylePablo Kogan, Jorge P. Arenas, Fernando Bermejo, María Hinalaf, Bruno Turra. A Green Soundscape Index (GSI): The potential of assessing the perceived balance between natural sound and traffic noise. Science of The Total Environment. 2018; 642 ():463-472.
Chicago/Turabian StylePablo Kogan; Jorge P. Arenas; Fernando Bermejo; María Hinalaf; Bruno Turra. 2018. "A Green Soundscape Index (GSI): The potential of assessing the perceived balance between natural sound and traffic noise." Science of The Total Environment 642, no. : 463-472.
A vibration damping layer can dissipate relatively large amounts of energy. A known effect of this dissipation of energy is the reduction of the response of a structure to sound and vibration excitation and the reduction of the transmission of sound through structures at high frequencies. Added damping also increases the impedances of structures at their resonances and thus may improve the effectiveness of vibration isolation at these resonances. It has been observed that the molecular behavior of new nanomaterial composites may have significant influence on their shock and vibration insulation properties. Dynamical mechanical characterization of these nanostructured materials is important for determining the potential application as a viscoelastic vibration damping layer. In this work, inclusion of several nanostructures to thermostable polyurethane has been made and their main elastic properties have been measured using current standard methods. It is observed that specific amounts of nanostructures can improve the impact damping capabilities of the material, with the advantage of reduced thickness and weight as compared to traditional materials.
Jp Arenas; Jl Castaño; Ml Auad. Dynamical mechanical characterization of a nanostructured vibration damping layer. Journal of Physics: Conference Series 2018, 1075, 012027 .
AMA StyleJp Arenas, Jl Castaño, Ml Auad. Dynamical mechanical characterization of a nanostructured vibration damping layer. Journal of Physics: Conference Series. 2018; 1075 (1):012027.
Chicago/Turabian StyleJp Arenas; Jl Castaño; Ml Auad. 2018. "Dynamical mechanical characterization of a nanostructured vibration damping layer." Journal of Physics: Conference Series 1075, no. 1: 012027.
Eco-materials employed to reduce noise are used either independently or as components of complex composite materials, which are a growing area of research. These eco-materials have the potential to be used as high-performance sound-absorbing noise isolators in a number of applications in areas such as transportation, architectural, industrial, and construction. Public concern about the environmental impact of transportation is leading to reduced fuel consumption and the use of recycled materials. These are clearly related to the reduction of weight, extending durable years. Currently, the concept of “green” building materials is used in practice in several European countries. In addition, public awareness and concern about the negative effects of pollution have led consumers to favor environmentally friendly materials, less contaminating processes, and recycled products. This chapter discusses eco-materials produced for the specific purpose of reducing noise. After an introduction to the subject, a section is devoted to the assessment of sustainable materials. Then, the fundamentals of the sound absorption, airborne sound insulation, and impact sound insulation properties of acoustical eco-materials are presented. The following section reviews common acoustical eco-materials, including those using natural fibers instead of synthetic ones, recycled fibers and surplus materials, advanced mix and composite eco-materials designed to provide better performance and produce lightweight materials that help in reducing fuel consumption and greenhouse gas emissions to the atmosphere, and, finally, green walls and roofs used on top of some buildings. All these eco-materials provide an alternative to chemical building materials, polymers, and other artificial non-sustainable materials.
Jorge P. Arenas; Francesco Asdrubali. Eco-Materials with Noise Reduction Properties. Handbook of Ecomaterials 2017, 1 -26.
AMA StyleJorge P. Arenas, Francesco Asdrubali. Eco-Materials with Noise Reduction Properties. Handbook of Ecomaterials. 2017; ():1-26.
Chicago/Turabian StyleJorge P. Arenas; Francesco Asdrubali. 2017. "Eco-Materials with Noise Reduction Properties." Handbook of Ecomaterials , no. : 1-26.
The soundscape paradigm is comprised of complex living systems where individuals interact moment-by-moment among one another and with the physical environment. The real environments provide promising conditions to reveal deep soundscape behavior, including the multiple components involved and their interrelations as a whole. However, measuring and analyzing the numerous simultaneous variables of soundscape represents a challenge that is not completely understood. This work proposes and applies a comprehensive methodology for multidimensional and synchronic data collection in soundscape. The soundscape variables were organized into three main entities: experienced environment, acoustic environment, and extra-acoustic environment, containing, in turn, subgroups of variables called components. The variables contained in these components were acquired through synchronic field techniques that include surveys, acoustic measurements, audio recordings, photography, and video. The proposed methodology was tested, optimized, and applied in diverse open environments, including squares, parks, fountains, university campuses, streets, and pedestrian areas. The systematization of this comprehensive methodology provides a framework for soundscape research, a support for urban and environment management, and a preliminary procedure for standardization in soundscape data collecting.
Pablo Kogan; Bruno Turra; Jorge P. Arenas; María Hinalaf. A comprehensive methodology for the multidimensional and synchronic data collecting in soundscape. Science of The Total Environment 2017, 580, 1068 -1077.
AMA StylePablo Kogan, Bruno Turra, Jorge P. Arenas, María Hinalaf. A comprehensive methodology for the multidimensional and synchronic data collecting in soundscape. Science of The Total Environment. 2017; 580 ():1068-1077.
Chicago/Turabian StylePablo Kogan; Bruno Turra; Jorge P. Arenas; María Hinalaf. 2017. "A comprehensive methodology for the multidimensional and synchronic data collecting in soundscape." Science of The Total Environment 580, no. : 1068-1077.
This chapter discusses the use of acoustic textiles in the transportation industry; the sector currently represents the most important application of textiles in the world. In general, acoustic textiles are used in the transportation industry to reduce interior noise and vibration and improve the sensation of ride comfort for the passengers. Interior noise is currently a competitive quality characteristic of every mode of transport facility in particular automobiles. Although interior noise lowers the comfort feeling inside a vehicle, it also induces fatigue and may reduce driving safety. The number of cars exceeds by many times the total number of other means of transport produced every year in the world. Therefore, the use and development of acoustic textiles have been more important in the automobile industry mainly because of economic reasons. A variety of sources contribute to the interior noise of a vehicle which can be structure-borne or airborne sound. Acoustic textiles used to control noise in vehicles must provide airborne transmission reduction, damping and sound absorption. However, the use of acoustic textiles in vehicles is not only dependent on their acoustic properties but also on additional characteristics. Selection of a particular material is also determined by its ratio between performance and cost. Acoustic textiles employed to reduce noise and vibrations are used either individually or as components of complex composite materials which are an interesting area of research. Although there are several books that have covered the subject of technical textiles in the transportation industry, this chapter aims to discuss those textile developments that are used mainly to provide noise isolation and sound absorption in different means of transport. This chapter is preceded by an introductory section. Then the use of acoustic textiles for noise control of main sources in cars is discussed. The final section is devoted to further applications of acoustic textiles in aircraft, trains, ships and spacecraft.
Jorge P. Arenas. Applications of Acoustic Textiles in Automotive/Transportation. Textile Science and Clothing Technology 2016, 143 -163.
AMA StyleJorge P. Arenas. Applications of Acoustic Textiles in Automotive/Transportation. Textile Science and Clothing Technology. 2016; ():143-163.
Chicago/Turabian StyleJorge P. Arenas. 2016. "Applications of Acoustic Textiles in Automotive/Transportation." Textile Science and Clothing Technology , no. : 143-163.
Wind energy is the world's fastest-growing renewable energy source; as a result, the number of people exposed to wind farm noise is increasing. Because of its broadband amplitude-modulated characteristic, wind turbine noise (WTN) is more annoying than noise produced by other common community/industrial sources. As higher frequencies are attenuated by air absorption and building transmission, the noise from modern large wind farms is mainly below 1000 and 500 Hz for outdoor and indoor conditions, respectively. Many WTN complaints relate to indoor, nighttime conditions when background noise levels are lower. As recently reported, indoor noise has the potential to cause sleeping disorders. Studies on human response to amplitude modulated WTN have been mainly focused on the outdoors, where a large amount of measured data exists. This is not the case for indoors, where it is much harder to gather data. Hence, there is a need to understand the transmission of WTN into dwellings and to develop indoor annoyance metrics. In this article, we investigate the transmission of WTN into residential-type structures. Using an outdoor WTN recording and structures with different properties/configurations, we made a series of computer simulations for indoor noise predictions and assessed the results employing several widely used metrics for WTN, for example, spectral content, modulation depth and overall levels. In general, the indoor noise levels are higher, and the average modulation depth is similar to those of outdoor recordings. In addition, there is a significant change in the spectral shape. These results could potentially explain indoor WTN annoyance. Copyright © 2016 John Wiley & Sons, Ltd.
Felipe A. Fernandez; Ricardo A. Burdisso; Jorge P. Arenas. Indoor simulation of amplitude modulated wind turbine noise. Wind Energy 2016, 20, 507 -519.
AMA StyleFelipe A. Fernandez, Ricardo A. Burdisso, Jorge P. Arenas. Indoor simulation of amplitude modulated wind turbine noise. Wind Energy. 2016; 20 (3):507-519.
Chicago/Turabian StyleFelipe A. Fernandez; Ricardo A. Burdisso; Jorge P. Arenas. 2016. "Indoor simulation of amplitude modulated wind turbine noise." Wind Energy 20, no. 3: 507-519.
In many countries such as Chile, there is scarce official information for generating accurate noise maps. Therefore, specific simplification methods are becoming a real need for the acoustic community in developing countries. Thus, the main purpose of this work was to evaluate and apply simplified methods to generate a cost-effective traffic noise map of a small city of Chile. The experimental design involved the simplification of the cartographic information on buildings by clustering the households within a block, and the classification of the vehicular traffic flows into categories to generate an inexpensive noise map. The streets have been classified according to the official road classification of the country. Segregation of vehicles from light, heavy and motorbikes is made to account for traffic flow. In addition, a number of road traffic noise models were compared with noise measurements and consequently the road traffic model RLS-90 was chosen to generate the noise map of the city using the Computer Aided Noise Abatement (CadnaA) software. It was observed a direct dependence between noise levels and traffic flow versus each category of street used. The methodology developed in this study appears to be convenient in developing countries to obtain accurate approximations to develop inexpensive traffic noise maps.
Nicolás A. Bastián-Monarca; Enrique Suárez; Jorge P. Arenas. Assessment of methods for simplified traffic noise mapping of small cities: Casework of the city of Valdivia, Chile. Science of The Total Environment 2016, 550, 439 -448.
AMA StyleNicolás A. Bastián-Monarca, Enrique Suárez, Jorge P. Arenas. Assessment of methods for simplified traffic noise mapping of small cities: Casework of the city of Valdivia, Chile. Science of The Total Environment. 2016; 550 ():439-448.
Chicago/Turabian StyleNicolás A. Bastián-Monarca; Enrique Suárez; Jorge P. Arenas. 2016. "Assessment of methods for simplified traffic noise mapping of small cities: Casework of the city of Valdivia, Chile." Science of The Total Environment 550, no. : 439-448.
Nicolás A. Bastián-Monarca; Jorge P. Arenas. Study of the sound radiation of a rectangular plate resting on a winkler elastic foundation. 22nd International Congress on Acoustics: Acoustics for the 21st Century 2016, 65002 .
AMA StyleNicolás A. Bastián-Monarca, Jorge P. Arenas. Study of the sound radiation of a rectangular plate resting on a winkler elastic foundation. 22nd International Congress on Acoustics: Acoustics for the 21st Century. 2016; ():65002.
Chicago/Turabian StyleNicolás A. Bastián-Monarca; Jorge P. Arenas. 2016. "Study of the sound radiation of a rectangular plate resting on a winkler elastic foundation." 22nd International Congress on Acoustics: Acoustics for the 21st Century , no. : 65002.
Marcelo Bustamante; Samir N.Y. Gerges; Erasmo F. Vergara; Jorge P. Arenas. High Damping Characteristics of an Elastomer Particle Damper. The International Journal of Acoustics and Vibration 2016, 21, 1 .
AMA StyleMarcelo Bustamante, Samir N.Y. Gerges, Erasmo F. Vergara, Jorge P. Arenas. High Damping Characteristics of an Elastomer Particle Damper. The International Journal of Acoustics and Vibration. 2016; 21 (1):1.
Chicago/Turabian StyleMarcelo Bustamante; Samir N.Y. Gerges; Erasmo F. Vergara; Jorge P. Arenas. 2016. "High Damping Characteristics of an Elastomer Particle Damper." The International Journal of Acoustics and Vibration 21, no. 1: 1.
Studies on new acoustic eco-materials are gaining importance as there is an increasing understanding about the benefits of the use of environmentally friendly materials. In producing noise control elements it is not only important to recycle but also to manufacture devices with recycled content. A noise barrier is one of the most used devices to reduce high noise levels. For designing these devices, a sound absorbing material is very often used as the core of the barrier. The main goal of this work is the design and testing of novel green sound absorbingmaterials used as part of noise barriers. Recycled textile materials and nontoxic binder fibers were employed to manufacture the eco-materials studied in this research. Acoustic characterization of prototype noise barriers was carried out in a customdesigned small-scale reverberation chamber for the testing of small samples. Results showed that new materials used in noise barrier prototypes performed very well according to international standards, with performance comparable with those of commercially available noise barriers made of typical sound absorbing materials. These new materials could be part of noise reducing devices incorporating an environmentally conscious technology.
Romina Del Rey; Laura Berto; Romina El Rey; Jesús Alba; Jorge P. Arenas. Acoustic characterization of recycled textile materials used as core elements in noise barriers. Noise Control Engineering Journal 2015, 63, 439 -447.
AMA StyleRomina Del Rey, Laura Berto, Romina El Rey, Jesús Alba, Jorge P. Arenas. Acoustic characterization of recycled textile materials used as core elements in noise barriers. Noise Control Engineering Journal. 2015; 63 (5):439-447.
Chicago/Turabian StyleRomina Del Rey; Laura Berto; Romina El Rey; Jesús Alba; Jorge P. Arenas. 2015. "Acoustic characterization of recycled textile materials used as core elements in noise barriers." Noise Control Engineering Journal 63, no. 5: 439-447.
A numerical method is developed for estimating the acoustic power of any baffled planar structure, which is vibrating with arbitrary surface velocity profile. It is well known that this parameter may be calculated with good accuracy using near field data, in terms of an impedance matrix, which is generated by the discretization of the vibrating surface into a number of elementary radiators. Thus, the sound pressure field on the structure surface can be determined by a combination of the matrix and the volume velocity vector. Then, the sound power can be estimated through integration of the acoustic intensity over a closed surface. On the other hand, few works exist in which the calculation is done in the far field from near field data by the use of radiation matrices, possibly because the numerical integration becomes complicated and expensive due to large variations of directivity of the source. In this work a different approach is used, based in the so-called Propagating Matrix, which is useful for calculating the sound pressure of an arbitrary number of points into free space, and it can be employed to estimate the sound power by integrating over a finite number of pressure points over a hemispherical surface surrounding the vibrating structure. Through numerical analysis, the advantages/disadvantages of the current method are investigated, when compared with numerical methods based on near field data. A flexible rectangular baffled panel is considered, where the normal velocity profile is previously calculated using a commercial finite element software. However, the method can easily be extended to any arbitrary shape. Good results are obtained in the low frequency range showing high computational performance of the method. Moreover, strategies are proposed to improve the performance of the method in terms of both computational cost and speed.
Mario A. González-Montenegro; Roberto Jordan; Arcanjo Lenzi; Jorge P. Arenas. A Numerical Approach to Calculate the Radiation Efficiency of Baffled Planar Structures Using the Far Field. Archives of Acoustics 2015, 39, 249 -260.
AMA StyleMario A. González-Montenegro, Roberto Jordan, Arcanjo Lenzi, Jorge P. Arenas. A Numerical Approach to Calculate the Radiation Efficiency of Baffled Planar Structures Using the Far Field. Archives of Acoustics. 2015; 39 (2):249-260.
Chicago/Turabian StyleMario A. González-Montenegro; Roberto Jordan; Arcanjo Lenzi; Jorge P. Arenas. 2015. "A Numerical Approach to Calculate the Radiation Efficiency of Baffled Planar Structures Using the Far Field." Archives of Acoustics 39, no. 2: 249-260.
Jesus Alba; J.P. Arenas; Romina Del Rey. Determinación de la presión sonora radiada por pistones circulares y anillos no planos usando un método numérico simplificado. Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería 2014, 30, 221 -228.
AMA StyleJesus Alba, J.P. Arenas, Romina Del Rey. Determinación de la presión sonora radiada por pistones circulares y anillos no planos usando un método numérico simplificado. Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería. 2014; 30 (4):221-228.
Chicago/Turabian StyleJesus Alba; J.P. Arenas; Romina Del Rey. 2014. "Determinación de la presión sonora radiada por pistones circulares y anillos no planos usando un método numérico simplificado." Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería 30, no. 4: 221-228.