Acoustic Properties of Wood-Based and Non-Wood-Based Materials for Piano-Case Making

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F24%3A43925312" target="_blank" >RIV/62156489:43410/24:43925312 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.5552/drvind.2024.0141" target="_blank" >https://doi.org/10.5552/drvind.2024.0141</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5552/drvind.2024.0141" target="_blank" >10.5552/drvind.2024.0141</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Acoustic Properties of Wood-Based and Non-Wood-Based Materials for Piano-Case Making

Popis výsledku v původním jazyce

This article presents the possibilities of substituting expensive and scarce wood materials in the construction of piano cases, especially the front panels of upright pianos. Three-layer blockboard, multi-layer plywood, medium-density fibreboard (MDF), and Purenit were selected for the study. These materials were long-time climatised at 20 oC and 50 % relative air humidity. Their frequencies, damping coefficient and relative amplitude were measured. The density r, sound velocity v, dynamic modulus of elasticity E&apos;, sound impedance Zn, and Acoustic Conversion Efficiency (ACE) were calculated. With the materials used to make the front panels of an upright piano, a subjective assessment of the instrument&apos;s acoustic response was made. The presence of front panels of any type was found to have a negative effect on the sound except at low frequencies. With panels fitted, the best acoustic properties were achieved by blockboard, followed by plywood, MDF and Purenit panels in that order; this was affirmed by the subjective assessment. The best acoustic performance was achieved by blockboard and plywood. Taking both price and performance into consideration, MDF presented the best compromise. Purenit was ruled out due to its high damping properties.

Název v anglickém jazyce

Acoustic Properties of Wood-Based and Non-Wood-Based Materials for Piano-Case Making

Popis výsledku anglicky

This article presents the possibilities of substituting expensive and scarce wood materials in the construction of piano cases, especially the front panels of upright pianos. Three-layer blockboard, multi-layer plywood, medium-density fibreboard (MDF), and Purenit were selected for the study. These materials were long-time climatised at 20 oC and 50 % relative air humidity. Their frequencies, damping coefficient and relative amplitude were measured. The density r, sound velocity v, dynamic modulus of elasticity E&apos;, sound impedance Zn, and Acoustic Conversion Efficiency (ACE) were calculated. With the materials used to make the front panels of an upright piano, a subjective assessment of the instrument&apos;s acoustic response was made. The presence of front panels of any type was found to have a negative effect on the sound except at low frequencies. With panels fitted, the best acoustic properties were achieved by blockboard, followed by plywood, MDF and Purenit panels in that order; this was affirmed by the subjective assessment. The best acoustic performance was achieved by blockboard and plywood. Taking both price and performance into consideration, MDF presented the best compromise. Purenit was ruled out due to its high damping properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Drvna Industrija

ISSN

0012-6772

e-ISSN

1847-1153

Svazek periodika

75

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

HR - Chorvatská republika

Počet stran výsledku

10

Strana od-do

227-236

Kód UT WoS článku

001250792200007

EID výsledku v databázi Scopus

2-s2.0-85200705359