Influence of dimensions of wooden samples for determination of acoustic parameters and sound timbre

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F22%3A43921667" target="_blank" >RIV/62156489:43410/22:43921667 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.apacoust.2022.108895" target="_blank" >https://doi.org/10.1016/j.apacoust.2022.108895</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apacoust.2022.108895" target="_blank" >10.1016/j.apacoust.2022.108895</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of dimensions of wooden samples for determination of acoustic parameters and sound timbre

Popis výsledku v původním jazyce

Wood is a popular material used in almost all areas of acoustics. The main reason for its vibro-acoustic properties is associated with orthotropic visco-elasticity, describing the ability to conduct, amplify or damp the sound vibrations in different applications. With modern technologies, it is possible to upgrade non-destructive material analysis to more detailed level. This study is dedicated to assess the vibro-acoustic properties of wood using frequency response to an impact excitation. Using one-axis sensors, the parameters such as dynamic modulus of elasticity, radiation coefficient, acoustic impedance, damping coefficient, and acoustic conversion efficiency were determined depending on the anatomical direction of wood. The dependence of sample dimensions and scale of measured parameters was evaluated. Broader description of the damping includes mode shape, its rank, direction and frequency. Comparison of vibro-acoustic behavior across important European species was performed. Results show samples with higher slenderness have smaller differences between MOED calculated from the first bending or first longitudinal mode shape. Analysis of the damping coefficient shows, mode shape, its rank and sample size have greater effect on material damping than frequency of vibrations.

Název v anglickém jazyce

Influence of dimensions of wooden samples for determination of acoustic parameters and sound timbre

Popis výsledku anglicky

Wood is a popular material used in almost all areas of acoustics. The main reason for its vibro-acoustic properties is associated with orthotropic visco-elasticity, describing the ability to conduct, amplify or damp the sound vibrations in different applications. With modern technologies, it is possible to upgrade non-destructive material analysis to more detailed level. This study is dedicated to assess the vibro-acoustic properties of wood using frequency response to an impact excitation. Using one-axis sensors, the parameters such as dynamic modulus of elasticity, radiation coefficient, acoustic impedance, damping coefficient, and acoustic conversion efficiency were determined depending on the anatomical direction of wood. The dependence of sample dimensions and scale of measured parameters was evaluated. Broader description of the damping includes mode shape, its rank, direction and frequency. Comparison of vibro-acoustic behavior across important European species was performed. Results show samples with higher slenderness have smaller differences between MOED calculated from the first bending or first longitudinal mode shape. Analysis of the damping coefficient shows, mode shape, its rank and sample size have greater effect on material damping than frequency of vibrations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10307 - Acoustics

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Applied Acoustics

ISSN

0003-682X

e-ISSN

1872-910X

Svazek periodika

196

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

108895

Kód UT WoS článku

000853020600011

EID výsledku v databázi Scopus

2-s2.0-85133819437