<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0012-7353</journal-id>
<journal-title><![CDATA[DYNA]]></journal-title>
<abbrev-journal-title><![CDATA[Dyna rev.fac.nac.minas]]></abbrev-journal-title>
<issn>0012-7353</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0012-73532019000300333</article-id>
<article-id pub-id-type="doi">10.15446/dyna.v86n210.73685</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Wood walls insulated with coconut fiber]]></article-title>
<article-title xml:lang="es"><![CDATA[Muro de madera aislado con fibra de coco]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villa]]></surname>
<given-names><![CDATA[Keven]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Echavarría]]></surname>
<given-names><![CDATA[César]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blessent]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Medellín  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>07</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>07</month>
<year>2019</year>
</pub-date>
<volume>86</volume>
<numero>210</numero>
<fpage>333</fpage>
<lpage>337</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0012-73532019000300333&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0012-73532019000300333&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0012-73532019000300333&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Solid wood gives the shape to walls, while panels are the coating and they are nailed or screwed to the wood sections. In the cavities between the wood elements and the panels, a thermal and acoustic insulator must be added. Unfortunately, almost all of the currently used insulators (mineral wool, expanded polystyrene, polyurethane) are not biodegradable and require the use of vapor barriers (polyethylene sheets, aluminum foils, etc.) that deteriorate rapidly and that are relatively environmentally unfriendly. In this article, the use of coconut fiber instead of conventional insulators is suggested. The acoustic absorption and thermal conductivity coefficients of composite sections taken from wood walls with coconut fiber are estimated. In this way, good thermo-acoustic conditions inside the wood building are achieved using an ecological insulating material.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La madera maciza da la forma al muro, los paneles son el recubrimiento y se clavan o atornillan a las secciones de madera. En las cavidades formadas entre los elementos de madera y el panel se debe adicionar un aislante térmico y también un aislante acústico. Infortunadamente, casi todos los aislantes usados en la actualidad (lanas minerales, poliestireno expandido, poliuretano) no son biodegradables y requieren el uso de barreras de vapor (láminas de polietileno, láminas de aluminio, etc.) que se deterioran rápidamente y son relativamente poco amigables con el medio ambiente. En este artículo, se propone usar la fibra de coco para reemplazar los aislantes convencionales. Se estiman los coeficientes de absorción acústica y de conductividad térmica de secciones compuestas tomadas de un muro de madera con fibra de coco. De esta forma, se busca mantener unas buenas condiciones termo-acústicas en el interior de la edificación de madera usando un material aislante ecológico.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[coconut fiber]]></kwd>
<kwd lng="en"><![CDATA[wood]]></kwd>
<kwd lng="en"><![CDATA[acoustic absorption]]></kwd>
<kwd lng="en"><![CDATA[thermal conductivity]]></kwd>
<kwd lng="es"><![CDATA[fibra de coco]]></kwd>
<kwd lng="es"><![CDATA[madera]]></kwd>
<kwd lng="es"><![CDATA[absorción acústica]]></kwd>
<kwd lng="es"><![CDATA[conductividad térmica]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>[1]</label><nlm-citation citation-type="book">
<collab>American society for testing and materials (ASTM)</collab>
<source><![CDATA[ASTM D143-94 (1994). Standard methods of testing on small clear specimens of timber]]></source>
<year>2006</year>
<publisher-loc><![CDATA[West Conshohocken, Pa ]]></publisher-loc>
<publisher-name><![CDATA[ASTM Annual Book of Standards]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<label>[2]</label><nlm-citation citation-type="book">
<collab>American society for testing and materials (ASTM)</collab>
<source><![CDATA[ASTM D2395-02 (2002). Standard test methods for specific gravity of wood and wood-based materials]]></source>
<year>2006</year>
<publisher-loc><![CDATA[West Conshohocken, Pa ]]></publisher-loc>
<publisher-name><![CDATA[ASTM Annual Book of Standards]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<label>[3]</label><nlm-citation citation-type="book">
<collab>American society for testing and materials (ASTM)</collab>
<source><![CDATA[ASTM E1050-12 (2012). Standard test method for impedance and absorption of acoustical materials using a tube, two microphones and a digital frequency analysis system]]></source>
<year>2012</year>
<publisher-loc><![CDATA[West Conshohocken, Pa ]]></publisher-loc>
<publisher-name><![CDATA[ASTM Annual Book of Standards]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<label>[4]</label><nlm-citation citation-type="book">
<collab>American society for testing and materials (ASTM)</collab>
<source><![CDATA[ASTM C177-13 (2013). Standard test method for steady-state heat flux measurements and thermal transmission properties by means of the guarded-hot-plate apparatus]]></source>
<year>2013</year>
<publisher-loc><![CDATA[West Conshohocken, Pa ]]></publisher-loc>
<publisher-name><![CDATA[ASTM Annual Book of Standards]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<label>[5]</label><nlm-citation citation-type="book">
<collab>American society for testing and materials (ASTM)</collab>
<source><![CDATA[ASTM C518-15 (2015). Standard test method for steady-state thermal transmission properties by means of the heat flow meter apparatus]]></source>
<year>2015</year>
<publisher-loc><![CDATA[West Conshohocken, Pa ]]></publisher-loc>
<publisher-name><![CDATA[ASTM Annual Book of Standards]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<label>[6]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alavez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Chiñas]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[V.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ortiz]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thermal conductivity of coconut fibre filled ferrocement sandwich panels]]></article-title>
<source><![CDATA[Construction and Building Materials]]></source>
<year>2012</year>
<volume>37</volume>
<page-range>425-31</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>[7]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Asasutjarit]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Hirunlabh]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Khedari]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Charoenvai]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Zeghmati]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Cheul-Shin]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Development of coconut coir-based lightweight cement board]]></article-title>
<source><![CDATA[Construction and Building Materials]]></source>
<year>2007</year>
<volume>21</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>277-88</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>[8]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ayub]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Nor]]></surname>
<given-names><![CDATA[M.J.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fouladi]]></surname>
<given-names><![CDATA[M.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Zulkifli]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Amin]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A practical acoustical absorption analysis of coir fiber based on rigid frame modeling]]></article-title>
<source><![CDATA[Acoustical Physics]]></source>
<year>2012</year>
<volume>58</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>246-55</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>[9]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Biot]]></surname>
<given-names><![CDATA[M.A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Theory of propagation of elastic waves in a fluid saturated porous solid]]></article-title>
<source><![CDATA[The Journal of the Acoustical Society of America]]></source>
<year>1956</year>
<volume>28</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>168-78</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>[10]</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Conde]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio de la fibra de coco con resina poliéster para la manufactura de palas de aerogeneradores de pequeña potencia]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Santo Domingo Tehuantepec, Oaxaca ]]></publisher-loc>
<publisher-name><![CDATA[Universidad del Istmo Campus Tehuantepec]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<label>[11]</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Courgey]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[Maisons bois chanvre et paille sur la commune de Montholier - Une expérimentation matériaux renouvelables. Collection recherche développement métier]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Paris, SEBTP ]]></publisher-loc>
<publisher-name><![CDATA[Fédération française du bâtiment]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<label>[12]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delany]]></surname>
<given-names><![CDATA[M.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Bazley]]></surname>
<given-names><![CDATA[E.N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Acoustical properties of fibrous absorbent materials]]></article-title>
<source><![CDATA[Applied Acoustics]]></source>
<year>1970</year>
<volume>3</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>105-16</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>[13]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dunn]]></surname>
<given-names><![CDATA[I.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Davern]]></surname>
<given-names><![CDATA[W.A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Calculation of acoustic impedance of multi-layer absorbers]]></article-title>
<source><![CDATA[Applied Acoustics]]></source>
<year>1986</year>
<volume>19</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>321-34</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>[14]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ford]]></surname>
<given-names><![CDATA[R.D.]]></given-names>
</name>
<name>
<surname><![CDATA[West]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The fundamental acoustic parameters of two commonly used absorbent materials]]></article-title>
<source><![CDATA[Applied Acoustics]]></source>
<year>1970</year>
<volume>3</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>89-103</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>[15]</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fre&#769;mond]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Ziller]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[De Nucé-De Lamothe]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[The coconut palm]]></source>
<year>1968</year>
<publisher-loc><![CDATA[Berne, Switzerland ]]></publisher-loc>
<publisher-name><![CDATA[International Potash Institute]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<label>[16]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fouladi]]></surname>
<given-names><![CDATA[M.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Ghassem]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ayub]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Mohd-Nor]]></surname>
<given-names><![CDATA[M.J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Implementation of coir fiber as acoustic absorber material]]></article-title>
<source><![CDATA[Noise &amp; Vibration Worldwide]]></source>
<year>2011</year>
<volume>42</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>11-6</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>[17]</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hens]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Applied building physics - Ambient conditions, building performance and material properties]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Darmstadt, Germany ]]></publisher-loc>
<publisher-name><![CDATA[Wiley Ernst &amp; Sohn]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<label>[18]</label><nlm-citation citation-type="">
<collab>International Organization for Standardization (ISO)10534-2:1998</collab>
<source><![CDATA[Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes - Part 2: Transfer-function method]]></source>
<year>1998</year>
</nlm-citation>
</ref>
<ref id="B19">
<label>[19]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Khedari]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Watsanasathaporn]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Hirunlabh]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Development of fibre-based soil-cement block with low thermal conductivity]]></article-title>
<source><![CDATA[Cement and concrete composites]]></source>
<year>2005</year>
<volume>27</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>111-6</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>[20]</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mohanty]]></surname>
<given-names><![CDATA[A.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Misra]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Drzal]]></surname>
<given-names><![CDATA[L.T]]></given-names>
</name>
</person-group>
<source><![CDATA[Natural fibers, biopolymers, and biocomposites]]></source>
<year>2005</year>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<label>[21]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Quintero]]></surname>
<given-names><![CDATA[S.L.]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[L.O]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Uso de fibra de estopa de coco para mejorar las propiedades mecánicas del concreto]]></article-title>
<source><![CDATA[Ingeniería y Desarrollo 20(Julio-Diciembre)]]></source>
<year>2006</year>
<page-range>134-50</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>[22]</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shiney]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Premlet]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Acoustic properties of composite coir mats]]></article-title>
<source><![CDATA[IOSR Journal of Applied Physics]]></source>
<year>2014</year>
<volume>6</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>18-23</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>[23]</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tudu]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<source><![CDATA[Processing and characterization of natural fiber reinforced polymer composites]]></source>
<year>2009</year>
<publisher-loc><![CDATA[Rourkela, India ]]></publisher-loc>
<publisher-name><![CDATA[Department of mechanical engineering, National Institute of Technology, Rourkela-769008]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<label>[24]</label><nlm-citation citation-type="">
<collab>UNFCMP - Union nationale française de charpente, menuiserie, parquets</collab>
<source><![CDATA[Structures en bois aux états limites: Introduction à l'Eurocode 5 - Matériaux et bases de calcul - STEP 1.]]></source>
<year>1996</year>
<publisher-loc><![CDATA[Eyrolles, Paris, France ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B25">
<label>[25]</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vorländer]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[Auralization - Fundamentals of acoustics, modelling, simulation, algorithms and acoustic virtual reality]]></source>
<year>2008</year>
<publisher-loc><![CDATA[Berlin, Germany ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
