Aleš Straže (Author), Bogdan Mitkovski (Author), Jan Tippner (Author), Katarina Čufar (Author), Željko Gorišek (Author)

Abstract

The possibility of supplementing the subjective traditional assessment of wood quality for percussion instruments with reliable acoustic measurements was studied. Sawn boards of African padouk (Pterocarpus soyauxii Taub.) were selected in a timber yard and classified into five grades by using the dynamic combined specific modulus of elasticity. Then they were sawn into raw xylophone bars, which were afterwards traditionally graded by listening to the sound damping at flexural bending excitation and additionally by acoustic measurements. A high quality grade matching of xylophone bars and sawn boards was confirmed. Highly graded material was mostly quarter sawn with straight or moderately interlocked grain. The sound quality of raw xylophone bars was not influenced by the wood density. It negatively correlated with sound damping (tan %) and positively with the specific modulus of elasticity and with absolute and relative acoustic conversion efficiency. The audial grading of xylophone bars could be improved or substituted by relative acoustic conversion efficiency.

Keywords

les;akustičnost lesa;akustične lastnosti lesa;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
Publisher: Springer-Verlag
UDC: 630*8
COBISS: 2347913 Link will open in a new window
ISSN: 0018-3768
Views: 916
Downloads: 292
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Other data

Secondary language: English
Secondary keywords: wood;wooden percussion instruments;acoustic properties;wood structure;
File type: application/msword
Type (COBISS): Not categorized
Pages: str. 235-243
Volume: ǂVol. ǂ73
Issue: ǂNo. ǂ2
Chronology: 2015
DOI: 10.1007/s00107-015-0878-0
ID: 9151309