Abstract
Cone Morphology as a Diagnostic Attribute of Resonant Properties of Standing Spruce Wood
Highlights
The insights of heuristic identification based on biotechnology law are given with the aim of defining the relationship of wood resonant properties with the form of seed scales of spruce growing in the Kama-Volga region of Russia
Direct methods are based on determining dendroacoustic indices with the help of ultrasonic and other instruments for measuring sound velocity in wood, its frequency-amplitude characteristics, and a number of other physical and mechanical properties (Bucur, 2006; Fedyukov and Makaryeva, 1992)
Danilov’s (1943) and Bakshayeva’s (1966) methods are taken as a basis for drawing up a matrix of initial data to differentiate the trees inside a population with respect to seed scale form, which results from their characteristic features
Summary
It is well-known that the ways to diagnose and select wood for manufacturing both musical instruments and acoustic panels for theatres and conservatories (Fedyukov et al, 2011) can be conventionally classified into direct and indirect. Direct methods are based on determining dendroacoustic indices with the help of ultrasonic and other instruments for measuring sound velocity in wood, its frequency-amplitude characteristics, and a number of other physical and mechanical properties (Bucur, 2006; Fedyukov and Makaryeva, 1992). Based on the results obtained, the main criterion of ‘musicality’ of the material, i.e. its acoustic constant of sound propagation K, is defined. К ≥ 12 m4/kg·cm is accepted for resonant wood. Direct methods involve some technical difficulties in conducting studies in the forest and are still used primarily in the laboratory environment
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