pdf romana - Universitatea Transilvania

the spruce tone wood was investigated in connection with musical instruments industry
requirements.
Among the subordinated objectives of the general purpose mentioned above are:
- Using an original research methodology in compliance with the complexity
involved in the structure and expression of spruce tone wood quality;
- Synthesis of the environmental factors and highlighting specific resonance
with spruce stands of forest districts studied;
- Highlighting morphological features of spruce tone wood trees standing, and
specifying the characters that are most closely related to the structure of the
tree;
- Propose management measures embodied in the forest-effective technical
interventions, to ensure sustainable management of spruce tone wood in our
country;
- Definition of quality classes for structural tone wood trees standing, and
some quality classes for components of violin-type musical instruments. The
overall description of an spruce tone wood;
- Study of tone wood defects, research of methods of using the defect in
obtaining components used in musical instruments;
- A original criteria for sorting tone wood, in agreement with the principles of
full recovery and superior wood quality compliance requirements imposed by
the manufacturers of musical instruments.
Paper covers 365 pages and contains 231 figures, 98 tables and over 230
references. The thesis is divided into eight chapters.
The first chapter presents the research objectives and location of
investigations. Research material and technique are presented in Chapter 2. Chapter 2
also covers the nature of investigations undertaken in the field and laboratory. To
achieve the aims of this research, were used 8 field test surfaces of different sizes . 182
specimens of spruce were measured, 375 samples were collected from trees and 65
rings were collected from 10 spruce tone wood trees felled during operations. 18 spruce
tone wood logs with lengths between 12.6 and 18 meters were examined through the
industrial process of obtaining components for musical instruments.
Chapter three examines the physical and phyto-geographic territory
investigated, the main objective being the identification of external influences on
spruce trees and tone wood. Chapter 4 is a foray into the current state of knowledge
about the spruce tone wood. In Chapter 4 is also presented and a brief description of the
main musical instruments made in Reghin. Chapter 5 summaries the production of
musical instruments with strings and bow; in order to underline the importance of tone
wood.
The results of this PhD research are presented and interpreted in Chapter 6.
Among the research undertaken are:
- Tonewood radial quality variability, as indicated by the indicators of wood
structure quality (width of annual rings, the proportion of late wood and the
difference between consecutive rings);
- Tonewood radial quality variability investigated on the cardinal directions;
- Tonewood radial quality variability, as assessed by indices and structural
areas as defined by the presence of axial nodes;
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