Possibilities of Decreasing Hygroscopicity of Resonance Wood Used in Piano Soundboards Using Thermal Treatment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F21%3A43918962" target="_blank" >RIV/62156489:43410/21:43918962 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3390/app11020475" target="_blank" >https://doi.org/10.3390/app11020475</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/app11020475" target="_blank" >10.3390/app11020475</a>
Alternative languages
Result language
angličtina
Original language name
Possibilities of Decreasing Hygroscopicity of Resonance Wood Used in Piano Soundboards Using Thermal Treatment
Original language description
This article presents the possibilities of decreasing moisture sorption properties via thermal modification of Norway spruce wood in musical instruments. The 202 resonance wood specimens that were used to produce piano soundboards have been conditioned and divided into three density groups. The first specimen group had natural untreated properties, the second was thermally treated at 180 oC, and the third group was treated at 200 oC. All specimens were isothermally conditioned at 20 oC with relative humidity values of 40, 60, and 80%. The equilibrium moisture content (EMC), swelling, and acoustical properties, such as the longitudinal dynamic modulus (E'L), bending dynamic modulus (Eb), damping coefficient (tan δ), acoustic conversion efficiency (ACEL), and relative acoustic conversion efficiency (RACEL) were evaluated on every moisture content level. Treatment at 180 oC caused the EMC to decrease by 36% and the volume swelling to decrease by 9.9%. Treatment at 200 oC decreased the EMC by 42% and the swelling by 39.6%. The 180 oC treatment decreased the value of the longitudinal sound velocity by 1.6%, whereas the treatment at 200 oC increased the velocity by 2.1%. The acoustical properties EL', Eb, ACEL, and RACEL were lower due to the higher moisture content of the samples, and only the tanδ increased. Although both treatments significantly affected the swelling and EMC, the treatment at 180 oC did not significantly affect the acoustical properties.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/TH02010978" target="_blank" >TH02010978: Elimination of moisture changes in a musical instrument</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Sciences
ISSN
2076-3417
e-ISSN
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Volume of the periodical
11
Issue of the periodical within the volume
2
Country of publishing house
CH - SWITZERLAND
Number of pages
10
Pages from-to
475
UT code for WoS article
000610904400001
EID of the result in the Scopus database
2-s2.0-85099178274