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Ing. Jakub Dömény, Ph.D.
Identification number: 26568
University e-mail: jakub.domeny [at] mendelu.cz
 
Výzkumník projektu I - Department of Wood Science and Technology (FFWT)

     
          Publications     Conferences
     

The following list contains all information available to the publication.

TIPPNER, J. -- DÖMÉNY, J. -- ZATLOUKAL, P. -- SUCHOMELOVÁ, P. Effect of Moderate Thermal Treatment on Properties of Resonance Spruce for Piano Soundboard. In Proceedings of the 2020 Society of Wood Science and Technology International Convention . Monona: Society of Wood Science and Technology, 2020, p. 607. ISBN 978-1-7340485-0-6.

Original name: Effect of Moderate Thermal Treatment on Properties of Resonance Spruce for Piano Soundboard
Czech name:
Written by (author): Ing. Jan Tippner, Ph.D.
Ing. Jakub Dömény, Ph.D.
Ing. Petr Zatloukal
Ing. Pavlína Suchomelová
Department: Department of Wood Science and Technology
Kind of publication:
abstract of an article in anthology
Collection:
Proceedings of the 2020 Society of Wood Science and Technology International Convention
Nature of article:
paper
Part number:
Starting page:
607
Up to page: 607
Number of pages: 1
Original language:
English
Description in original language:
Thermal modifications of wood could provide perspective way to reduce negative effect of moisture on musical instruments. Resonance spruce (Picea abies L. Karst) used for soundboards is characterized by high sound velocity in longitudinal direction, low internal friction and high specific dynamic modulus of elasticity. The moderate thermal treatment with steam protection can maintain original acoustic properties with significant influence on equilibrium moisture content (EMC) and dimension stability. To test the effect of thermal treatment the 3 groups of specimens (44mm x 450mm x 12mm) of resonance wood selected from piano soundboards manufacturing have been prepared (un-treated, 180oC, 200oC) and conditioned in 20oC and relative humidity steps of 40%, 60% and 80%. The relative weight loss 4.7% and 7% was achieved by modifications at 180oC and 200oC respectively. EMC, longitudinal and bending dynamic modulus of elasticity, logaritmic decrement of damping and acoustic conversion efficiency (ACE) were evaluated in every step of conditioning. The decreasing of EMC by both thermal treatment is significant, the specimen modified at 180oC showed about 36% lower EMC at 60% relative humidity, the treatment by 200oC brought about 42% decreasing of EMC. Both treatments significantly affected EMC but the effect on acoustic properties was not statistically significant, however, the changes for 200oC treated group were more perceptible. Acoustic properties were compared at every step of conditioning too. Dynamic moduli and ACE decreased with higher EMC and the damping increased for control group and both modified groups.
Description in English:
Description in Czech:
Year of submission:
2020
 
Entry made by:
Last change: 08/11/2020 12:39 (Mgr. Kamila Zoufalá)

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Source specification:

Proceedings of the 2020 Society of Wood Science and Technology International Convention . Monona: Society of Wood Science and Technology, 2020. ISBN 978-1-7340485-0-6.

Original name:
Proceedings of the 2020 Society of Wood Science and Technology International Convention
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Kind of publication:
conference proceedings
ISBN:
978-1-7340485-0-6
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Society of Wood Science and Technology
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Monona
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2020
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Entry: 2020 Society of Wood Science and Technology (SWST) International Convention
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Entry made by: Mgr. Kamila Zoufalá
Last change:
08/11/2020 09:18 (Mgr. Kamila Zoufalá)

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2020 Society of Wood Science and Technology (SWST) International Convention. 2020, Portorož.

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2020 Society of Wood Science and Technology (SWST) International Convention
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Kind of publication:
holding a conference
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Portorož
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worldwide event
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2020
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Entry made by: Mgr. Kamila Zoufalá
Last change:
08/11/2020 09:18 (Mgr. Kamila Zoufalá)

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