Wood anatomy and acoustic properties of selected tropical hardwoods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F16%3A43908428" target="_blank" >RIV/62156489:43410/16:43908428 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1163/22941932-20160121" target="_blank" >http://dx.doi.org/10.1163/22941932-20160121</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1163/22941932-20160121" target="_blank" >10.1163/22941932-20160121</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Wood anatomy and acoustic properties of selected tropical hardwoods

Popis výsledku v původním jazyce

Selected anatomical features and ground tissue composition were studied in four tropical hardwoods (Afzelia sp. [Doussié], Intsia sp. [Merbau], Astronium sp. [Muiracatiara] and Millettia sp. [Wengé]). These woods can be applied in musical instrument production, especially for xylophone bars. The measured density, 1st bending natural frequency and the logarithmic decrement of damping were used to calculate other acoustic properties such as dynamic young modulus of elasticity (Erf ), specific modulus of elasticity (E'/ρ), internal friction (tan δ), and acoustic conversion efficiency (ACE).The correlations between anatomy and acoustic properties were determined. Despite difficulties in specifying general characteristics of hardwoods due to their complicated and variable structure, correlations valid between species were found for specific modulus of elasticity. Specific modulus of elasticity was negatively correlated with ray tissue volume and positively with ray height to width ratio and fiber length. The diversity in ground tissue composition was the main criterion for the species choice and probably should condition diverse correlations of anatomical features found for individual species. It seems that better acoustic properties (higher stiffness, ACE or specific modulus of elasticity) are performed by wood with longer fibers and slender rays, causing minimal deflection of adjoining fibers.

Název v anglickém jazyce

Wood anatomy and acoustic properties of selected tropical hardwoods

Popis výsledku anglicky

Selected anatomical features and ground tissue composition were studied in four tropical hardwoods (Afzelia sp. [Doussié], Intsia sp. [Merbau], Astronium sp. [Muiracatiara] and Millettia sp. [Wengé]). These woods can be applied in musical instrument production, especially for xylophone bars. The measured density, 1st bending natural frequency and the logarithmic decrement of damping were used to calculate other acoustic properties such as dynamic young modulus of elasticity (Erf ), specific modulus of elasticity (E'/ρ), internal friction (tan δ), and acoustic conversion efficiency (ACE).The correlations between anatomy and acoustic properties were determined. Despite difficulties in specifying general characteristics of hardwoods due to their complicated and variable structure, correlations valid between species were found for specific modulus of elasticity. Specific modulus of elasticity was negatively correlated with ray tissue volume and positively with ray height to width ratio and fiber length. The diversity in ground tissue composition was the main criterion for the species choice and probably should condition diverse correlations of anatomical features found for individual species. It seems that better acoustic properties (higher stiffness, ACE or specific modulus of elasticity) are performed by wood with longer fibers and slender rays, causing minimal deflection of adjoining fibers.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/EE2.3.20.0269" target="_blank" >EE2.3.20.0269: Vytvoření mezinárodního vědecko-výzkumného týmu pro vývoj nových materiálů na bázi dřeva</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

IAWA Journal

ISSN

0928-1541

e-ISSN

—

Svazek periodika

37

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

69-83

Kód UT WoS článku

000372539200005

EID výsledku v databázi Scopus

2-s2.0-84971320572