Romina Del Rey

Romina Del Rey
Polytechnic University of Valencia | UPV · Centre for Physics Technologies (CTFAMA)

About

87
Publications
56,565
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1,173
Citations
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March 2010 - December 2013
Polytechnic University of Valencia
Position
  • Researcher

Publications

Publications (87)
Article
Full-text available
This paper presents the initial prototypes of solutions designed using plastic caps, seeking acoustic applications for both airborne sound insulation and the acoustic conditioning of rooms. Plastic caps are a waste product from the packaging sector and they constitute a major waste problem, given that, if they are not attached to the packaging, the...
Article
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Many synthetic materials used as sound absorbers in building industry require many resources in their manufacturing process; therefore, searching for sustainable and eco-friendly alternatives, such as biocomposites with natural fibers embedded in a polymer matrix, is a promising option. In this work, soy protein was combined with 10, 15 and 20 wt %...
Article
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Citation: Lora-Martín, A.; Sequí-Sabater, J.M.; del Rey-Tormos, R.; Alba-Fernández, J.; Sequí-Canet, J.M. Vibroacoustic Pollution in the Neonatal Ward. Encyclopedia 2023, 3, 449-457. https://doi.org/10.3390/ encyclopedia3020030 Academic Editors: Hueng-Chuen Definition: Excessive noise pollution is often a problem for neonatal nurseries. Noise pollu...
Article
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Brass instruments mouthpieces have been historically built using metal materials, usually brass. With the auge of additive manufacturing technologies new possibilities have arisen, both for testing alternative designs and for using new materials. This work assesses the use of polymers for manufacturing trombone mouthpieces, specifically PLA and Nyl...
Article
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Hospitals generate huge amounts of nonwoven residues daily. This paper focused on studying the evolution of nonwoven waste generated in the Francesc de Borja Hospital, Spain, over the last few years and its relation to the COVID-19 pandemic. The main objective was to identify the most impacting pieces of nonwoven equipment in the hospital and to an...
Article
Airflow resistivity is an essential parameter for characterizing air-saturated porous sound-absorbing materials theoretically and selecting sound-absorbing materials in practice. Although standardized methods can determine this non-acoustic parameter in the laboratory, many indirect alternative methods have been proposed to measure it. One of them...
Conference Paper
La asignatura Aislamiento Acústico en la Edificación, del Máster en Ingeniería Acústica, de la Escuela Politécnica Superior de Gandia, es punto de control de la Competencia Transversal “Conocimientos de problemas contemporáneos” desde hace seis años. En este trabajo se muestra cómo se ha puesto en marcha utilizando la redacción de informes técnicos...
Article
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Neonatal wards are often subject to excessive noise pollution. Noise pollution encompasses two concepts, noise and vibration; their main difference being that a noise is heard and a vibration is felt in the body. The latter is what can be transmitted within the incubators of neonatal inpatients. This fact needs to be explored in depth. This work sh...
Article
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In building acoustics, two different problems usually arise. There is a need to comply with established sound insulation parameters, but there are also legislative conditions concerning reverberation time. It is therefore necessary to acoustically insulate and condition the enclosures. When designing the acoustic treatment of buildings, sound insul...
Article
A fibrous material is characterized by its fineness, flexibility and high length/fineness ratio and it is used to reduce noise in indoor rooms due to their porous structure. The aim of this work is focused on investigating the structure of two different fibers (acrylic and polyester) from the analysis of the macrostructural parameters, such as fine...
Article
The use of membranes attached to sound absorbing materials, with the aim of modifying its absorption properties, is quite a usual practice in acoustic conditioning applications. The behavior of the final composition formed by the sound absorbing base material and the attached membrane can serve to characterize the effect of the membrane, if the pro...
Article
Airflow resistance is a non-acoustic parameter of great relevance in the acoustic characterization of porous materials. It is used in several sound absorbing material prediction models and it is also a control parameter for acoustic conditioning and insulation in different building solutions. The ISO 9053 standard defines several methods to obtain...
Article
Textile materials used without any other structures show low absorption throughout the operating frequency range, and they are currently used for interior decoration. These fabrics can play an important role in the development of acoustic materials considering folding techniques in the design phase. The folding of a cotton fabric not only affects t...
Article
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The ecological transition is a process the building industry is bound to undertake. This study aimed to develop new bio-based building partition typologies and to determine if they are suitable ecological alternatives to the conventional non-renewable ones used today. This work started with the development of a bio-based epoxy composite board and a...
Conference Paper
La asignatura Transductores e Instrumentación Acústica, del Grado en Ingeniería de Sistemas de Telecomunicación, Sonido e Imagen, de la Escuela Politécnica Superior de Gandia, es punto de control de la Competencia Transversal “Aprendizaje Permanente” desde hace cinco años. En este trabajo se muestra cómo se ha puesto en marcha utilizando trabajos t...
Article
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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 espa...
Article
The use of microcapsules is increasing in the textile industry and play an important role in the field of acoustical porous materials in order to adopt solutions for the control of noise. In this work, we present an experimental study of the acoustic effect of woven textile fabrics doped with microcapsules by using the padding technique. For this p...
Article
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The acoustic properties of recycled polyurethane foams are well known. Such foams are used as a part of acoustic solutions in different fields such as building or transport. This paper aims to seek improvements in the sound absorption of these recycled foams when they are combined with fabrics. For this aim, foams have been drilled with cylindrical...
Article
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p>En este trabajo se desarrollan de forma numérica modelos empíricos que permiten conocer el comportamiento acústico de materiales utilizados en soluciones constructivas en la edificación. Este trabajo se engloba dentro del Máster Universitario en Ingeniería Acústica (MIA) de la Escuela Politécnica Superior de Gandía en la Universitat Politècnica d...
Article
In this paper, a method for measuring the airflow resistivity of air-saturated porous sound-absorbing materials is presented. The method is based on a modification of the previous device developed by Dragonetti et al. The approach used in the present work involves a cavity and a Helmholtz resonator that are coupled through a loudspeaker so that the...
Article
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In order to assess the airborne sound insulation of a new material or building solution, access to standardized laboratories, large and expensive facilities, and a sample area of at least 10 m2 are required. At the research and development stages of new sustainable acoustic materials for construction, it is not easy to make large sample areas avail...
Conference Paper
Presentamos los pasos realizados dentro de una PIME denominado "Metodologías activas en asignaturas básicas. Un catálogo de demostraciones experimentales de física diseñado como recursos didácticos para la motivación del grado" que arranca en el 2016 y continuará hasta 2019. En este proyecto se está elaborando un catálogo de demostraciones experime...
Article
Traditionally, glass fibre has been used as plastic reinforcement whenever mechanical properties of a matrix, like stiffness, do not meet the specifications. However, current tendencies try to replace glass fibres by more sustainable fibres to obtain eco-friendlier products. Natural fibres show comparatively good physical and mechanical properties...
Article
A comparative LCA from cradle to grave between traditional plasterboard, for drywall applications, and different composite boards, made by natural fiber and a bio-based epoxy resin (Supersap CLR), was carried out. The goal of the study was to determine whether the composites based on such a resin combined with natural fibers could be an eco-friendl...
Article
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In recent years, natural materials are becoming a valid alternative to traditional sound absorbers due to reduced production costs and environmental protection. This paper reports the acoustical characterization of sheep wool. Measurements on normal incidence and diffuse-incidence sound absorption coefficients of different samples are reported. The...
Article
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This paper presents the design, construction, calibration and automation of a reverberation chamber for small samples. A balance has been sought between reducing sample size, to reduce the manufacturing costs of materials, and finding the appropriate volume of the chamber, to obtain reliable values at high and mid frequencies. The small-sized rever...
Article
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The formulation of greener composite materials by substituting glass fibers with natural fibers is a current field of research. If such natural fiber reinforcements come from industrial side streams, as hemp core fibers (HCFs) come from the extraction of hemp strands for the textile industry, an additional advantage can be identified. Nonetheless,...
Article
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The recreation of historical battles next to old buildings, walls, churches, fortifications or historical facades belonging to the historical heritage of a city, has always been a source of controversy and discussion. In the absence of a clear legislation about how these buildings can be affected by the use of blunderbusses and pyrotechnics, it is...
Conference Paper
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Al “Grup d’Innovación Educativa i Recerca en Matèries Científiques (GIERMAC)”, se le concedió en noviembre de 2016 el proyecto PIME-UPV, “Puesta en marcha de diversas experiencias con el enfoche Flip Teaching en asignaturas de Física y matemáticas”, continuación de otro proyecto anterior titulado“Estudio sobre la aplicación del Flip Teaching en asi...
Conference Paper
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En este trabajo se muestran los primeros pasos que se han llevado a cabo dentro de un proyecto PIME de la convocatoria 2016-2017 del Vicerrectorado de Estudios, Calidad y Acreditación de la Universidad Politécnica de Valencia titulado “Metodologías activas en asignaturas básicas. Creación de un catálogo de demostraciones experimentales o proyectos...
Conference Paper
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Resumen Utilizar el aprendizaje de manera estratégica, autónoma y flexible, a lo largo de toda la vida, en función del objetivo perseguido es una de las competencias transversales que es punto de control de la asignatura “Transductores e Instrumentación Acústica” de la titulación del Grado en Ingeniería de Sistemas de Telecomunicación, Sonido e Ima...
Conference Paper
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El aprendizaje permanente es una de las competencias transversales que la Universitat Politécnica de Valencia pretende acreditar. La asignatura “Transductores e Instrumentación Acústica” de la titulación del Grado en Ingeniería de Sistemas de Telecomunicación, Sonido e Imagen es punto de control de dicha competencia. En el curso 2015-2016 se han pu...
Conference Paper
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La UPV potencia la aplicación de nuevas metodologías docentes, como es el caso del Flipped Teaching o clase inversa, que consiste, a grandes rasgos, en hacer en casa lo que tradicionalmente se hace en el aula (la exposición teórica) y realizar en el aula lo que comúnmente se hace en casa (resolución de problemas). Este planteamiento supone disponer...
Conference Paper
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Al “Grup d’Innovación Educativa i Recerca en Matèries Científiques (GIERMAC)”, se le ha concedido en octubre de 2015 el proyecto PIME-UPV, “Estudio sobre la aplicación del Flip Teaching en asignaturas de Matemáticas y Física”. El trabajo que se presenta relata una primera experiencia completa realizada con los alumnos de Física del Grado en Ingenie...
Article
Noise, caused by the society and technical progress, is nowadays considered a pollutant. Noise pollution affects or could affect a great number of people. One the most concerned fields, in part by a growing law framework and by the quality expectations of the clients, is architecture. The solution to sound pollution involves eliminating it or reduc...
Article
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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 re...
Conference Paper
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Esta comunicacion trata sobre la prueba de aplicacion del aprendizaje basado en proyectos en la asignatura de Fisica del Grado en Ingenieria de Telecomunicacion, Sonido e Imagen. Se realiza esta primera experiencia donde el ultimo bloque tematico dedicado al campo magnetico y a la induccion magnetica se articula en forma de proyectos que los alumno...
Article
The present paper investigates the acoustic properties of natural fiber reinforced composites. Fibers from orange tree pruning were obtained and subject to different treatments in order to obtain mechanical, thermomechanical and chemi-thermomechanical pulps. These pulps were used as reinforcement for a polypropylene matrix. The obtained composite m...
Article
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Recyclable cellulose loose-fill insulation has been commonly used in heavy timber construction for treating attic areas, under floors, and wall cavities. Through the kraft process, the unbleached cellulose adopts a texture characterized by small crumbs, forming a porous medium. In this work, different samples of a single layer of loose-fill cellulo...
Article
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En este artículo se muestra cómo un alumno puede abordar problemas de acústica de salas ya en primer curso de Grado, con el soporte de las asignaturas de Matemáticas. De este modo, el alumno, encuentra una aplicabilidad directa de los conociminetos adquiridos en asignaturas en asignaturas de Matemáticas en su futuro entorno laboral. Este proyecto s...
Article
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In the present paper, a methodology is proposed for obtaining empirical equations describing the sound absorption characteristics of an absorbing material obtained from natural fibers, specifically from coconut. The method, which was previously applied to other materials, requires performing measurements of air-flow resistivity and of acoustic impe...
Article
Stiffness is one of the most relevant characteristics of composite materials. Natural wood fibers have demonstrated their ability to increase the Young's moduli of composite materials, and old newspapers are a potential source of reinforcing fibers for composite materials. There are some micromechanic models to predict the Young's modulus of compos...
Article
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The statistical or random-incidence sound absorption coefficient is the most important pa-rameter to characterize a porous sound absorbing material in practice. According to the ISO standardized procedure this parameter can be measured directly in reverberation chambers where a perfect diffuse sound field is attained. Basically, the procedure compa...
Article
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Although the study of the sound pressure radiation from membranes and plates is not new, current and future applications have produced a large body of recent research in the field. Several works have been published on the radiation from general plane surfaces and some particular geometries such as rectangular, circular, elliptic and annular. Howeve...
Article
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It is well known that sound absorption and sound transmission properties of open porous materials are highly dependent on their airflow resistance values. Low values of airflow resistance indicate little resistance for air streaming through the porous material and high values are a sign that most of the pores inside the material are closed. The lab...
Article
The present paper investigates the suitability of old newspapers (ONPs) as a source of reinforcing fibers for composite materials. Different percentages of ONP fibers were compounded with polypropylene (PP). A coupling agent was added to the compound to improve the interface between matrix and reinforcing fibers. Tensile test were performed to obta...
Article
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The capacity and computing power of programs like Matlab enables first year students of a college degree are able to model using the computer both topographic maps and roads on them, as acoustic maps. In other words, moving from paper to digital model. This article shows several collaborative works made over many years by Gandia Campus students of...
Article
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The main contribution of this paper is the formulation of an alternative to experimental determination of loss factor and, consequently, to improve the predictions of airborne sound insulation for any type of monolithic or laminated glass. In addition, a review of the standards related to measurement of mechanical parameters of glass is carried out...
Article
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Currently, acoustic isolation is one of the problems raised with building construction in Spain. The publication of the Basic Document for the protection against noise of the Technical Building Code has increased the demand of comfort for citizens. This has created the need to seek new composite materials that meet the new required acoustical build...
Article
Resumen La evaluación del ruido transmitido por flancos en edificación es esencial para el estudio del aislamiento a ruido aéreo. Desde el punto de vista numérico, para la determinación de las transmisiones laterales es necesario conocer un parámetro conocido como índice de reducción vibracional. Para obtener este parámetro con el objetivo de conoc...
Article
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Polyurethane foam waste is one of the residues of the manufacturing processes in textile industry, the disposal of which is becoming a severe environmental problem. In this paper the sound absorption properties of different materials developed from ground polyurethane foam waste are studied. Because these recycled materials exhibit good sound absor...
Article
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El aislamiento acústico es un problema de difícil solución una vez que la obra ya está acabada. En el caso de que la obra esté finalizada y no se cumplan con los valores de calidad acústicos que nos marca la legislación, deben detectarse los puntos débiles que provocan esa deficiencia de aislamiento acústico. La publicación de catálogos de solucion...
Article
This paper describes the procedure followed to evaluate the vibration reduction index for T-junctions with inserted flexible elements and proposes new equations to complement the standard EN 12354-1:2000. The experiment described in this work is based on a 1:3 scale model of a T-junction with a flexible interlayer. It was used to obtain a significa...
Article
A poor sound insulation of building elements that constitute a building has a difficult solution when the building is finished. If we have a finished building in which not reached the minimum values of sound quality that marks the relevant legislation, we must be able to detect weaknesses that cause gaps in the sound insulation. The publication of...
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Resumen La obtención de la presión radiada por superficies planas no es un problema nuevo. Es un problema que está en estudio por la complejidad del tema y por su aplicación al diseño de altavoces planos. Estos son cada vez más comunes en televisores, techos, pantallas de cine, paneles, etc. En estos casos predomina sobre todo la forma rectangular....
Article
The use of Micro-Perforated Panels (MPPs) in acoustics has extended since they offer an important contribution to room-conditioning and isolation solutions as wideband absorbers, although this is not their only application. Some audio communication systems use them as protection and for aesthetic. This work analyzes the behavior of MPPs forming par...
Article
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In the building acoustics field usually fibrous materials are used as sound absorbing materials. Nowadays polyester fiber is one of the most used but the pure chip of polyester has a problem. Polyester is obtained of petroleum and its price was increasing last years. This paper, presents an alternative polyester wool which obtained by PET treatment...
Article
Berm mounds are a commonly used technique to reduce the environmental noise levels produced by highways. A berm is a natural noise barrier constructed of soil, stone, rock, or rubble, often landscaped, running along a highway to protect adjacent communities from noise pollution. An earth mound may be constructed using surplus materials at project s...
Article
Full-text available
Characterization of sound absorbing materials is essential to predict its acoustic behaviour. The most commonly used models to do so consider the flow resistivity, porosity, and average fibre diameter as parameters to determine the acoustic impedance and sound absorbing coefficient. Besides direct experimental techniques, numerical approaches appea...
Article
Full-text available
Foams are widely used as sound absorbing materials in noise control engineering. These sound absorbing materials are used to control the noise and vibration in many mechanical systems, including industrial machines, home appliances, vehicles, and buildings. A foam material is a solid that contains cavities, channels or interstices so that the sound...
Article
Porous materials are widely used as sound absorbing materials in noise control engineering. In view of the growing interest in sustainable construction a new field involves the creation of the acoustic absorbents using recycled material based on industrial residues or derived from plants. Some authors already have models of prediction for this type...
Article
Several alternatives to mitigate road traffic noise impact have been reported, although constructing a noise barrier is probably the most important mitigation measure when the construction of a highway is planned. A noise barrier impedes the transmission of traffic noise, resulting in low noise levels at the receiving point. Earth-mounds, fences, o...
Article
Characterization of sound absorbing materials is needed to predict its behavior. The most commonly used models to do so consider the flow resistivity, porosity, and average fiber diameter as parameters to determine the acoustic impedance and sound absorbing coefficient. Besides direct experimental techniques, numerical approaches appear to be an al...
Article
In this work, the acoustic behavior of recycled polyurethane foams is studied in the frequency domain. Other authors have described the behavior of porous materials based either on the flow resistance [Dunn & Davern] or the structural characteristics of the pores [Voronina]. The main objective of all these works has been the determination of the pr...
Article
One of the main corrective measures taken to reduce environmental noise produced by roads is using sound barriers. However, the construction of miles of noise barriers implies a high cost. One solution to reduce the costs is using recycled materials in the noise barriers, for example, plastic wastes, which has great environmental benefits. Accordin...
Article
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In controlling environmental noise, a lot of effort is put in place to optimize noise barriers. However, in doing so, the noise barriers are usually made of materials that are difficult to recycle. Currently, several studies are aimed to use textile-based materials, such as polyester wool instead of mineral wool, in manufacturing noise barriers. Ho...
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Acoustic Standards in the building are responsible for, companies and individuals, propose new acoustic materials for the sound isolation. This paper presents a new sound-absorbent material, it is based on natural fibres, particularly fibres of kenaf. It also proposes an empirical model for this material, this models depends on the frequency. There...