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Rubén Maderuelo-Sanz
Instituto Tecnológico de Rocas Ornamentales y Materiales de Construcción, INTROMAC, Campus Universidad de Extremadura, 10071 Cáceres, Spain

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Research article
Published: 16 May 2021 in Journal of Environmental Health Science and Engineering
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This work deals an experimental and theoretical research about the porous structure and the acoustic performance of cellulose acetate coming from the used cigarette filters. The porous structure was studied through the measurement and the prediction (using an inverse methodology) of some non-acoustic properties (bulk density, fiber size, porosity or flow resistivity and tortuosity). The sound absorption performance was evaluated by comparing experimental measurements using an impedance tube according to ISO 10534-2 with the best-fit approach obtained using some empirical models (Delany and Bazley, Garai-Pompoli, Komatsu and Miki). The accuracy of empirical models to obtain the flow resistivity was relatively high showing differences lower than 8% in the case of the Miki model or lower than 12% in the case of Delany & Bazley model. Regarding the absorption spectra, the errors found were lower than 9% for all the empirical models used in this work. These results showed that using relatively simple models such as empirical models were able to predict accurately the acoustic behaviour of the cellulose acetate. Finally, the sound absorption spectra obtained for cellulose acetate were compared with those obtained for fibrous materials currently used in building sector, suggesting that this fibrous waste could act as a possible substitute to traditional ones, due to the similar relatively high NRC values obtained for both type of fibrous absorber (NRC = 0.65).

ACS Style

Rubén Maderuelo-Sanz. Characterizing and modelling the sound absorption of the cellulose acetate fibers coming from cigarette butts. Journal of Environmental Health Science and Engineering 2021, 19, 1075 -1086.

AMA Style

Rubén Maderuelo-Sanz. Characterizing and modelling the sound absorption of the cellulose acetate fibers coming from cigarette butts. Journal of Environmental Health Science and Engineering. 2021; 19 (1):1075-1086.

Chicago/Turabian Style

Rubén Maderuelo-Sanz. 2021. "Characterizing and modelling the sound absorption of the cellulose acetate fibers coming from cigarette butts." Journal of Environmental Health Science and Engineering 19, no. 1: 1075-1086.

Short communication
Published: 30 April 2021 in Science of The Total Environment
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This paper presents the results of an experimental study on the acoustic efficiency of plastic surgical face masks. Since the very high number of disposable masks being used globally on a daily basis to face the Covid19 pandemic is posing new environmental risks, mainly connected to improper disposal, any possible improvements in the management of this waste stream is very important. In this work their potential use as sound porous absorber is discussed. Surgical face masks are mainly made of polypropylene fibers which show good acoustical properties. Their porous structure was studied through the measurement of some non-acoustic properties: bulk density, fiber diameter, porosity, flow resistivity and tortuosity. Moreover, the sound absorption performance of samples, made of scrapped face masks, with different thicknesses was evaluated using an impedance tube according to ISO 10534-2. The results obtained from the sound absorption spectra and two single indexes, Noise Reduction Coefficient and Sound Absorption Average showed a high sound absorption value over a frequency range of interest. Finally, the sound absorption spectra obtained for surgical face masks were compared with those obtained for fibrous materials currently used in building sector, suggesting that this fibrous waste could act as a possible substitute to traditional ones.

ACS Style

Rubén Maderuelo-Sanz; Patricia Acedo-Fuentes; Francisco José García-Cobos; Francisco José Sánchez-Delgado; María Isabel Mota-López; Juan Miguel Meneses-Rodríguez. The recycling of surgical face masks as sound porous absorbers: Preliminary evaluation. Science of The Total Environment 2021, 786, 147461 .

AMA Style

Rubén Maderuelo-Sanz, Patricia Acedo-Fuentes, Francisco José García-Cobos, Francisco José Sánchez-Delgado, María Isabel Mota-López, Juan Miguel Meneses-Rodríguez. The recycling of surgical face masks as sound porous absorbers: Preliminary evaluation. Science of The Total Environment. 2021; 786 ():147461.

Chicago/Turabian Style

Rubén Maderuelo-Sanz; Patricia Acedo-Fuentes; Francisco José García-Cobos; Francisco José Sánchez-Delgado; María Isabel Mota-López; Juan Miguel Meneses-Rodríguez. 2021. "The recycling of surgical face masks as sound porous absorbers: Preliminary evaluation." Science of The Total Environment 786, no. : 147461.

Journal article
Published: 29 April 2021 in Sustainability
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A characterization of the sound absorption of a sustainable material with scarce current use such as natural virgin cork is presented in this paper in order to explore further possible applications in the design of acoustic solutions. Different samples of virgin cork not bonded and various decorative panel formats were tested under random sound incidence conditions in a standardized reverberation chamber. The samples in which the outer bark of the cork was facing upwards showed a better behavior as an acoustic absorber, with sound absorption coefficient values generally greater than 0.6 for frequency bands between 1 and 5 kHz. The results obtained were compared with samples of some recycled materials available in the scientific literature, such as sheep wool and PET.

ACS Style

Juan Barrigón Morillas; David Montes González; Rosendo Vílchez-Gómez; Valentín Gómez Escobar; Rubén Maderuelo-Sanz; Guillermo Rey Gozalo; Pedro Atanasio Moraga. Virgin Natural Cork Characterization as a Sustainable Material for Use in Acoustic Solutions. Sustainability 2021, 13, 4976 .

AMA Style

Juan Barrigón Morillas, David Montes González, Rosendo Vílchez-Gómez, Valentín Gómez Escobar, Rubén Maderuelo-Sanz, Guillermo Rey Gozalo, Pedro Atanasio Moraga. Virgin Natural Cork Characterization as a Sustainable Material for Use in Acoustic Solutions. Sustainability. 2021; 13 (9):4976.

Chicago/Turabian Style

Juan Barrigón Morillas; David Montes González; Rosendo Vílchez-Gómez; Valentín Gómez Escobar; Rubén Maderuelo-Sanz; Guillermo Rey Gozalo; Pedro Atanasio Moraga. 2021. "Virgin Natural Cork Characterization as a Sustainable Material for Use in Acoustic Solutions." Sustainability 13, no. 9: 4976.

Journal article
Published: 27 November 2020 in Construction and Building Materials
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The aim of this work is to characterize the Rammed-Earth from the Almohad wall of Cáceres, Spain. Since the knowledge on the mechanical and physical properties of this historical structure is scarce, despite the significance of this archaeological ensemble, declared a World Heritage Site by UNESCO in 1986, this work contributes with the knowledge of the construction mode of the Rammed-Earth, providing useful information about the original building techniques, the raw materials and the production technology used in this defensive structure built eight centuries ago. An advanced knowledge of the materials state used in the construction of this historical wall is required for a possible reliable restoration and preservation in which compatible materials may be used. For this purpose, an experimental campaign was carried out on the constituent materials of this monument, mainly composed by Rammed-Earth. In this work 12 different zones of the old city wall of Cáceres were analyzed by X-ray diffractometry, thermogravimetric analysis, infrared spectroscopy, compressive strength and mercury intrusion porosimetry. The results, presented and discussed, showed that this Rammed-Earth can be considered like an authentic concrete, made of lime and siliceous aggregates, mainly coming from granites and quartzites fragments, abundant local geomaterials, and that their good physical and mechanical properties are comparables to other ancient concretes. With this work, it is possible to fill the gap that exists in this field, characterizing the materials used in this ancient rampart, never previously studied.

ACS Style

María Isabel Mota-López; Rubén Maderuelo-Sanz; José David Pastor-Valle; Juan Miguel Meneses-Rodríguez; Antonio Romero-Casado. Analytical characterization of the almohad rammed-earth wall of Cáceres, Spain. Construction and Building Materials 2020, 273, 121676 .

AMA Style

María Isabel Mota-López, Rubén Maderuelo-Sanz, José David Pastor-Valle, Juan Miguel Meneses-Rodríguez, Antonio Romero-Casado. Analytical characterization of the almohad rammed-earth wall of Cáceres, Spain. Construction and Building Materials. 2020; 273 ():121676.

Chicago/Turabian Style

María Isabel Mota-López; Rubén Maderuelo-Sanz; José David Pastor-Valle; Juan Miguel Meneses-Rodríguez; Antonio Romero-Casado. 2020. "Analytical characterization of the almohad rammed-earth wall of Cáceres, Spain." Construction and Building Materials 273, no. : 121676.

Brief original
Published: 15 October 2019 in European Journal of Wood and Wood Products
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This paper is a first study to evaluate the possible use of loose cork granulates as core element in noise barriers. To obtain the acoustical performance of loose cork granulates inside a noise screen, a small prototype of a noise absorbing barrier was designed and compared to commercial rock wool. The results obtained showed that these kinds of porous absorber, specially sorted and prepared, could be good sound absorbers with a certain broadband absorption spectrum.

ACS Style

Rubén Maderuelo-Sanz; Juan Miguel Barrigón Morillas. Loose cork granulates as possible new core element in noise barriers. European Journal of Wood and Wood Products 2019, 77, 1229 -1231.

AMA Style

Rubén Maderuelo-Sanz, Juan Miguel Barrigón Morillas. Loose cork granulates as possible new core element in noise barriers. European Journal of Wood and Wood Products. 2019; 77 (6):1229-1231.

Chicago/Turabian Style

Rubén Maderuelo-Sanz; Juan Miguel Barrigón Morillas. 2019. "Loose cork granulates as possible new core element in noise barriers." European Journal of Wood and Wood Products 77, no. 6: 1229-1231.

Journal article
Published: 05 May 2018 in Revista de la construcción
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DOI: 10.7764/RDLC.17.1.38Carolina Coronado Theatre was inaugurated in 1916. Its original design resembles a classical opera theatre, having a traditional horseshoe form, used throughout 19th century. Before the renovation its volume-number of seats ratio and its reverberation time with audience, were far away from some recommended values. Its renovation was done respecting faithfully the original appearance of the hall, without changes in the raised stage, seating area or walls and only including a new concept of acoustic dynamic shell based in diffusers, above the stage, that can create different acoustical ambiences. This acoustic configuration was slightly helped by covering lateral walls with acoustic panels. The results were obtained from the simulations in the software ODEON and “in situ” measurements.

ACS Style

Manuel Martín Castizo; Instituto Tecnológico De Rocas Ornamentales Y Materiales De Construcción; Ruben Maderuelo-Sanz. Dynamic acoustic shell with diffusers in the acoustical treatment of Carolina Coronado Theatre, Almendralejo (Badajoz, Spain). Revista de la construcción 2018, 17, 38 -46.

AMA Style

Manuel Martín Castizo, Instituto Tecnológico De Rocas Ornamentales Y Materiales De Construcción, Ruben Maderuelo-Sanz. Dynamic acoustic shell with diffusers in the acoustical treatment of Carolina Coronado Theatre, Almendralejo (Badajoz, Spain). Revista de la construcción. 2018; 17 (1):38-46.

Chicago/Turabian Style

Manuel Martín Castizo; Instituto Tecnológico De Rocas Ornamentales Y Materiales De Construcción; Ruben Maderuelo-Sanz. 2018. "Dynamic acoustic shell with diffusers in the acoustical treatment of Carolina Coronado Theatre, Almendralejo (Badajoz, Spain)." Revista de la construcción 17, no. 1: 38-46.

Journal article
Published: 01 January 2018 in Applied Acoustics
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ACS Style

Rubén Maderuelo Sanz; Valentín Gómez Escobar; Juan Miguel Meneses-Rodríguez. Potential use of cigarette filters as sound porous absorber. Applied Acoustics 2018, 129, 86 -91.

AMA Style

Rubén Maderuelo Sanz, Valentín Gómez Escobar, Juan Miguel Meneses-Rodríguez. Potential use of cigarette filters as sound porous absorber. Applied Acoustics. 2018; 129 ():86-91.

Chicago/Turabian Style

Rubén Maderuelo Sanz; Valentín Gómez Escobar; Juan Miguel Meneses-Rodríguez. 2018. "Potential use of cigarette filters as sound porous absorber." Applied Acoustics 129, no. : 86-91.

Journal article
Published: 01 October 2017 in Applied Acoustics
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ACS Style

Valentín Gómez Escobar; Rubén Maderuelo Sanz. Acoustical performance of samples prepared with cigarette butts. Applied Acoustics 2017, 125, 166 -172.

AMA Style

Valentín Gómez Escobar, Rubén Maderuelo Sanz. Acoustical performance of samples prepared with cigarette butts. Applied Acoustics. 2017; 125 ():166-172.

Chicago/Turabian Style

Valentín Gómez Escobar; Rubén Maderuelo Sanz. 2017. "Acoustical performance of samples prepared with cigarette butts." Applied Acoustics 125, no. : 166-172.

Original paper
Published: 16 November 2016 in Archaeological and Anthropological Sciences
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The aim of this work is to characterize the original concrete from Roman buildings for public spectacles, theatre and amphitheatre, from Emerita Augusta, Mérida, Spain. An advanced knowledge of the Roman concrete composition is required for a reliable restoration and preservation of these ancient monuments. The concrete was studied through mineralogical (optical polarized microscopy and X-ray diffraction) and petrophysical (bulk and real density, open porosity to water and Hg, mechanical strength and ultrasonic velocity) analyses. With this work, it is possible to fill the gap that exists in this field and the characterization of the materials used in the Roman concrete from these two buildings, never previously studied, despite the significance of this archaeological ensemble, declared a World Heritage Site by UNESCO in 1993. The results allowed us to determine the composition of the Roman concrete and to infer the provenance of the aggregates used in these monuments.

ACS Style

María Isabel Mota López; Rafael Fort; Mónica Álvarez De Buergo; Antonio Pizzo; Rubén Maderuelo Sanz; Juan Miguel Meneses-Rodríguez; Duygu Ergenç. Characterization of concrete from Roman buildings for public spectacles in Emerita Augusta (Mérida, Spain). Archaeological and Anthropological Sciences 2016, 10, 1007 -1022.

AMA Style

María Isabel Mota López, Rafael Fort, Mónica Álvarez De Buergo, Antonio Pizzo, Rubén Maderuelo Sanz, Juan Miguel Meneses-Rodríguez, Duygu Ergenç. Characterization of concrete from Roman buildings for public spectacles in Emerita Augusta (Mérida, Spain). Archaeological and Anthropological Sciences. 2016; 10 (5):1007-1022.

Chicago/Turabian Style

María Isabel Mota López; Rafael Fort; Mónica Álvarez De Buergo; Antonio Pizzo; Rubén Maderuelo Sanz; Juan Miguel Meneses-Rodríguez; Duygu Ergenç. 2016. "Characterization of concrete from Roman buildings for public spectacles in Emerita Augusta (Mérida, Spain)." Archaeological and Anthropological Sciences 10, no. 5: 1007-1022.

Journal article
Published: 02 March 2016 in Acoustics Australia
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This paper reports an investigation of the acoustical performance of consolidated lightweight granular materials, made of perlite, arlite and vermiculite mixed with polyurethane resin. These materials could help combat the noise control and replace some products that lack the sufficient structural strength and require expensive protection when exposed to the elements. The advantages of using these composites in acoustic applications, like noise barriers, compared with commercial materials, are their very light mass combined with a relatively high structural strength, high physical–chemical stability and low cost. Besides, these materials could be considered more acceptable, from the health point of view, and better suited to operate in an aggressive environment. Acoustical properties were assessed according to ISO 10534–2: 1998. The microstructure, through non-acoustical properties (porosity, tortuosity and flow resistivity), and the acoustical performance (sound absorption spectrum and normalized acoustic impedance) were studied, showing the influence of the non-acoustical properties in the acoustical performance.

ACS Style

Rubén Maderuelo-Sanz; Antonio V. Nadal-Gisbert; José Enrique Crespo Amorós; Juan Miguel Barrigón Morillas; Francisco Parres; Ernesto Juliá Sanchis. Influence of the Microstructure in the Acoustical Performance of Consolidated Lightweight Granular Materials. Acoustics Australia 2016, 44, 149 -157.

AMA Style

Rubén Maderuelo-Sanz, Antonio V. Nadal-Gisbert, José Enrique Crespo Amorós, Juan Miguel Barrigón Morillas, Francisco Parres, Ernesto Juliá Sanchis. Influence of the Microstructure in the Acoustical Performance of Consolidated Lightweight Granular Materials. Acoustics Australia. 2016; 44 (1):149-157.

Chicago/Turabian Style

Rubén Maderuelo-Sanz; Antonio V. Nadal-Gisbert; José Enrique Crespo Amorós; Juan Miguel Barrigón Morillas; Francisco Parres; Ernesto Juliá Sanchis. 2016. "Influence of the Microstructure in the Acoustical Performance of Consolidated Lightweight Granular Materials." Acoustics Australia 44, no. 1: 149-157.

Journal article
Published: 01 October 2014 in European Journal of Wood and Wood Products
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This paper analyses the impact noise reduction of resilient layers made from cork granulates with eight different sizes, mixed with polyurethane and epoxy resins. The predicted impact sound improvement index and dynamic stiffness are compared with some commercially available underlays. According to the type of binder and particle size, the acoustical cork based layers present values of the impact sound improvement index and dynamic stiffness similar to the commercial layers used in buildings.

ACS Style

Rubén Maderuelo-Sanz; Juan Miguel Barrigón Morillas; Valentín Gómez Escobar. The performance of resilient layers made from cork granulates mixed with resins for impact noise reduction. European Journal of Wood and Wood Products 2014, 72, 833 -835.

AMA Style

Rubén Maderuelo-Sanz, Juan Miguel Barrigón Morillas, Valentín Gómez Escobar. The performance of resilient layers made from cork granulates mixed with resins for impact noise reduction. European Journal of Wood and Wood Products. 2014; 72 (6):833-835.

Chicago/Turabian Style

Rubén Maderuelo-Sanz; Juan Miguel Barrigón Morillas; Valentín Gómez Escobar. 2014. "The performance of resilient layers made from cork granulates mixed with resins for impact noise reduction." European Journal of Wood and Wood Products 72, no. 6: 833-835.

Journal article
Published: 15 February 2014 in European Journal of Wood and Wood Products
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This paper reports on an investigation of the acoustical performance of loose cork granulates. This investigation is based on the physical parameters of loose granular cork obtained through an empirical model of the acoustic properties of loose granular media shown by Voronina and Horoshenkov and the experimental performance of these granulates. The performance is assessed according to ISO 10534-2 (1998). The data obtained show clearly that this porous absorber exhibits high sound absorption performance varying with particle size. The relationship between the experimental and the model results demonstrates the existence of significant differences between particle sizes >3.5 mm. Finally, the performance of this material is compared to other granular materials.

ACS Style

Rubén Maderuelo-Sanz; Juan Miguel Barrigón Morillas; Valentín Gómez Escobar. Acoustical performance of loose cork granulates. European Journal of Wood and Wood Products 2014, 72, 321 -330.

AMA Style

Rubén Maderuelo-Sanz, Juan Miguel Barrigón Morillas, Valentín Gómez Escobar. Acoustical performance of loose cork granulates. European Journal of Wood and Wood Products. 2014; 72 (3):321-330.

Chicago/Turabian Style

Rubén Maderuelo-Sanz; Juan Miguel Barrigón Morillas; Valentín Gómez Escobar. 2014. "Acoustical performance of loose cork granulates." European Journal of Wood and Wood Products 72, no. 3: 321-330.

Journal article
Published: 01 May 2013 in Latin American Journal of Solids and Structures
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This paper reports an investigation of a new kind of material and its acoustical performance. The main component of this porous absorber is the ground tyre rubber (GTR) with different particle sizes, from the shredding of tyres of heavy vehicles, mixed with different proportion of polyurethane resin. Acoustical properties were assessed according to ISO 10534 - 2: 1998. The data obtained show porous absorbers having a high sound absorption performance with low thicknesses and compared to some of the current models for the prediction of their absorptive properties. The use of this model constitutes a good tool in order to design a new sound absorber to solve two environmental problems, noise and environmental pollution.

ACS Style

Rubén Maderuelo-Sanz; Juan Miguel Barrigón Morillas; Manuel Martín Castizo; Valentín Gómez Escobar; Guillermo Rey Gozalo. Acoustical performance of porous absorber made from recycled rubber and polyurethane resin. Latin American Journal of Solids and Structures 2013, 10, 585 -600.

AMA Style

Rubén Maderuelo-Sanz, Juan Miguel Barrigón Morillas, Manuel Martín Castizo, Valentín Gómez Escobar, Guillermo Rey Gozalo. Acoustical performance of porous absorber made from recycled rubber and polyurethane resin. Latin American Journal of Solids and Structures. 2013; 10 (3):585-600.

Chicago/Turabian Style

Rubén Maderuelo-Sanz; Juan Miguel Barrigón Morillas; Manuel Martín Castizo; Valentín Gómez Escobar; Guillermo Rey Gozalo. 2013. "Acoustical performance of porous absorber made from recycled rubber and polyurethane resin." Latin American Journal of Solids and Structures 10, no. 3: 585-600.

Journal article
Published: 30 April 2012 in Applied Acoustics
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The use of material waste, coming from the fibers of fluff (a textile residue from grounded end of life tires, ELTs), in the manufacture of sound absorber products, can help to combat two different kind of problems, the disposal of this kind of waste and the noise control. This paper presents the results of a new absorber material obtained through thermal compression, using a residue that is currently used for its high calorific value. Through this process, a product with a higher added value and a lower cost has been obtained. Through testing of samples made with fluff, results for absorption coefficients and acoustic impedance have been obtained. In addition, composite samples have been tested. One of these samples is a composite made with a layer of ground tire rubber (GTR), obtained by sintering and adding another layer of fluff.

ACS Style

Rubén Maderuelo-Sanz; Antonio V. Nadal-Gisbert; José Enrique Crespo Amorós; Francisco Parres. A novel sound absorber with recycled fibers coming from end of life tires (ELTs). Applied Acoustics 2012, 73, 402 -408.

AMA Style

Rubén Maderuelo-Sanz, Antonio V. Nadal-Gisbert, José Enrique Crespo Amorós, Francisco Parres. A novel sound absorber with recycled fibers coming from end of life tires (ELTs). Applied Acoustics. 2012; 73 (4):402-408.

Chicago/Turabian Style

Rubén Maderuelo-Sanz; Antonio V. Nadal-Gisbert; José Enrique Crespo Amorós; Francisco Parres. 2012. "A novel sound absorber with recycled fibers coming from end of life tires (ELTs)." Applied Acoustics 73, no. 4: 402-408.

Journal article
Published: 30 November 2011 in Applied Acoustics
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This paper reports an investigation of a new kind of material and its acoustical performance. The potential of recycled materials made from rubber fluff for reducing impact noise was assessed according to EN ISO 140-8:1997. The performance of these materials was compared to those of some commercially available underlays.

ACS Style

Rubén Maderuelo-Sanz; Manuel Martín Castizo; Rosendo Vílchez-Gómez. The performance of resilient layers made from recycled rubber fluff for impact noise reduction. Applied Acoustics 2011, 72, 823 -828.

AMA Style

Rubén Maderuelo-Sanz, Manuel Martín Castizo, Rosendo Vílchez-Gómez. The performance of resilient layers made from recycled rubber fluff for impact noise reduction. Applied Acoustics. 2011; 72 (11):823-828.

Chicago/Turabian Style

Rubén Maderuelo-Sanz; Manuel Martín Castizo; Rosendo Vílchez-Gómez. 2011. "The performance of resilient layers made from recycled rubber fluff for impact noise reduction." Applied Acoustics 72, no. 11: 823-828.