Voichita Bucur – författare

Acoustics of Wood offers a detailed treatment of numerous topics that are valuable to those working with wood in architecture, engineering, acoustics, and the crafting of musical instruments. It presents a comprehensive account of the progress and current knowledge concerning wood acoustics, outlining the anatomy and physiology of wood and the specific applications in which its acoustic properties are relevant.Acoustics of Wood reviews state-of-the-art measurement systems and includes material that has not been widely published. Divided into three main parts, the book describes environmental acoustics, presents acoustics methods for the characterization of the elastic behavior of wood, and discusses acoustic methods for the assessment of wood quality.

Acoustics of Wood offers a detailed treatment of numerous topics that are valuable to those working with wood in architecture, engineering, acoustics, and the crafting of musical instruments. It presents a comprehensive account of the progress and current knowledge concerning wood acoustics, outlining the anatomy and physiology of wood and the specific applications in which its acoustic properties are relevant. Acoustics of Wood reviews state-of-the-art measurement systems and includes material that has not been widely published. Divided into three main parts, the book describes environmental acoustics, presents acoustics methods for the characterization of the elastic behavior of wood, and discusses acoustic methods for the assessment of wood quality.

This book addresses key questions about the materials used for the wind instruments of classical symphony orchestra such as flutes, clarinets, saxophones, oboes, bassoons and pipe organs. The content of this book is structured into four parts.Part 1- Description of materials for wind instruments deals with wood species and materials for reeds used for making clarinet, oboe and bassoon- and, with metallic materials and alloys for - horn, trumpet, trombone, etc. Auxiliary materials associated with the manufacturing of wind instruments are felt, cork, leather and parchment. Part 2- Basic acoustics of wind instruments, in which are presented succinctly, some pertinent aspects related to the physics of the resonant air column. An important aspect discussed is related to the effect of wall material on the vibration modes of the walls of wind instruments. The methods for measuring the acoustical properties of wind instruments are presented. Part 3- Manufacturing of wind instruments, describes the technology used in manufacturing metallic tubes and pipes made of wood. Part 4 - The durability and degradation of materials addresses data about methods for cleaning wind instruments, studies factors producing degradation of organ pipes, describes methods of conservation and restoration of brass instruments and of historical pipe organs. Finally, the properties of marble are described, being the only one nondegradable and sustainable material used for pipes for organs.

This book addresses key questions about the materials used for the wind instruments of classical symphony orchestra such as flutes, clarinets, saxophones, oboes, bassoons and pipe organs.

This book describes the properties of materials used for making percussion instruments for classical music played by a symphony orchestra in which the instruments could be played as a soloist instrument or as a group or several groups of instruments, as they are included into a musical work.

This book can be viewed in many ways as it explores the interdisciplinarity of research in violin engineering and art, being a valuable reference for readers interested in the acoustics of violins and in the science of materials used for making them. In this book, the wood science, the chemistry of varnish, the art and technology of violin making by luthiers and organologic context of violins, are put together giving a holistic view of the subject and complementing the large literature which exists on this instrument. The book is addressed to teachers, researchers, makers of musical instruments and artists alike, this being a good premise for understanding the complexity of the interdisciplinary phenomena that musical instruments involve. This book is based on the material most of which was accumulated during the period 2019-2024, within the ACADIA (61PCE/2022) and MINOVIS (568PED/2020) projects, financial supported by The Executive Unit for the Financing of Higher Education, Research, Development and Innovation from Romania (UEFISCDI).

This book addresses core questions about the role of materials in general and of wood in particular in the construction of string instruments used in the modern symphony orchestra – violins, violas, cellos and basses. Further attention is given to materials for classical guitars, harps, harpsichords and pianos. While some of the approaches discussed are traditional, most of them depend upon new scientific approaches to the study of the structure of materials, such as for example wood cell structure, which is visible only using modern high resolution microscopic techniques. Many examples of modern and classical instruments are examined, together with the relevance of classical techniques for the treatment of wood. Composite materials, especially designed for soundboards could be a good substitute for some traditional wood species. The body and soundboard of the instrument are of major importance for their acoustical properties, but the study also examines traditional and new wood species used for items such as bows, the instrument neck, string pegs, etc. Wood species’ properties for musical instruments and growth origins of woods used by great makers such as Antonio Stradivari are examined and compared with more recently grown woods available to current makers. The role of varnish in the appearance and acoustics of the final instrument is also discussed, since it has often been proposed as a ‘secret ingredient’ used by great makers. Aspects related to strings are commented.As well as discussing these subjects, with many illustrations from classical and contemporary instruments, the book gives attention to conservation and restoration of old instruments and the physical results of these techniques. There is also discussion of the current value of old instruments both for modern performances and as works of art having great monetary value.The book will be of interest and value to researchers, advanced students, music historians, and contemporary string instrument makers. Musicians in general, particularly those playing string instruments, will also find its revelations fascinating. It will also attract the attention of those using wood for a variety of other purposes, for its use in musical instruments uncovers many of its fundamental features.Professor Neville H. FletcherAustralian National University, Canberra

Wood species’ properties for musical instruments and growth origins of woods used by great makers such as Antonio Stradivari are examined and compared with more recently grown woods available to current makers.

In general, trees are viewed as admired symbolic individuals, producing rec- ational, spiritual and emotional rejuvenation. Their lifespan can far exceed that of humans. Planting a tree is a singular act of faith in the future, c- ating a legacy for the community members who will follow. The presence of trees in an urban area has been a reality for several centuries. Beautiful trees in urban plazas are synonymous with a high sense of community and civic pride. Trees signi?cantly enhance the landscaping and appearance of the built environment. City trees improve several architectural and engineering functions, prov- ing a green infrastructure for communities. Trees create a friendlier envir- ment for walking, riding bikes and working, by reducing glare and softening harsh traf?c sounds and concrete views. Trees enhance the viewing in urban areas of a variety of birds and small animals, such as squirrels. They are of extreme importance to the functioning of many different ecosystems. Trees planted in the right place around buildings can improve air conditioning and heating costs by providing shade or by affecting wind speed or direction. Ev- green trees with dense, persistent needles can be used to provide a windbreak, while deciduous trees allow the sun to warm a house in winter. The more c- pact the branches and foliage of a group of trees, the greater their in?uence as a windbreak.

The subject of nondestructive evaluation of wood properties has its origin in the necessity to solve practical problems. This book comprehensively reviews numerous aspects of imaging and nondestructive characterization of wood products ranging from trees to the most complex wood-based composite. The text is of particular interest to those who are concerned with the study of wood as an engineering material for fundamental research or practical application. It presents the imaging of the internal structure of wood with methods based on the propagation of electromagnetic waves, elastic waves and heat, and imaging with nuclear particle radiation based methods.

In general, trees are viewed as admired symbolic individuals, producing rec- ational, spiritual and emotional rejuvenation. Their lifespan can far exceed that of humans. Planting a tree is a singular act of faith in the future, c- ating a legacy for the community members who will follow. The presence of trees in an urban area has been a reality for several centuries. Beautiful trees in urban plazas are synonymous with a high sense of community and civic pride. Trees signi?cantly enhance the landscaping and appearance of the built environment. City trees improve several architectural and engineering functions, prov- ing a green infrastructure for communities. Trees create a friendlier envir- ment for walking, riding bikes and working, by reducing glare and softening harsh traf?c sounds and concrete views. Trees enhance the viewing in urban areas of a variety of birds and small animals, such as squirrels. They are of extreme importance to the functioning of many different ecosystems. Trees planted in the right place around buildings can improve air conditioning and heating costs by providing shade or by affecting wind speed or direction. Ev- green trees with dense, persistent needles can be used to provide a windbreak, while deciduous trees allow the sun to warm a house in winter. The more c- pact the branches and foliage of a group of trees, the greater their in?uence as a windbreak.

The subject of nondestructive evaluation of wood properties has its origin in the necessity to solve practical problems. This book comprehensively reviews numerous aspects of imaging and nondestructive characterization of wood products ranging from trees to the most complex wood-based composite. The text is of particular interest to those who are concerned with the study of wood as an engineering material for fundamental research or practical application. It presents the imaging of the internal structure of wood with methods based on the propagation of electromagnetic waves, elastic waves and heat, and imaging with nuclear particle radiation based methods.

The Third Edition of Acoustics of Wood offers a comprehensive overview of advanced acoustical techniques for wood characterization and assessment. It stands as an authoritative guide on using ultrasound and acoustic emissions to assess and characterize wood's physical and mechanical properties.Divided into six parts, this extended and updated edition covers a broad spectrum of topics including ultrasonic wave propagation, nondestructive testing methods for wood characterization, and the innovative use of acoustics in quality assessment of wood products. It also explores the acoustic properties vital for musical instruments and the application of acoustics in preserving historically significant art objects and timber structures. With chapters on cutting-edge topics like artificial intelligence's role in wood acoustics, readers are invited to explore the intersection of tradition and technology.Targeted at professionals and researchers in materials science, engineering, and conservation, this edition is invaluable for those seeking to deepen their knowledge of wood's acoustic properties. Readers with a background in physics or engineering will find the discussions on ultrasonic techniques and acoustic emissions particularly enlightening. By bridging theoretical concepts with practical applications, this book not only enriches scientific understanding but also opens up new avenues for innovation in wood assessment and preservation.

In the last quarter century, delamination has come to mean more than just a failure in adhesion between layers of bonded composite plies that might affect their load-bearing capacity. Ever-increasing computer power has meant that we can now detect and analyze delamination between, for example, cell walls in solid wood. This fast-moving and critically important field of study is covered in a book that provides everyone from manufacturers to research scientists the state of the art in wood delamination studies.Divided into three sections, the book first details the general aspects of the subject, from basic information including terminology, to the theoretical basis for the evaluation of delamination. A settled terminology in this subject area is a first key goal of the book, as the terms which describe delamination in wood and wood-based composites are numerous and often confusing. The second section examines different and highly specialized methods for delamination detection such as confocal laser scanning microscopy, light microscopy, scanning electron microscopy and ultrasonics. Ways in which NDE (non-destructive evaluation) can be employed to detect and locate defects are also covered. The book’s final section focuses on the practical aspects of this defect in a wide range of wood products covering the spectrum from trees, logs, laminated panels and glued laminated timbers to parquet floors. Intended as a primary reference, this book covers everything from the microscopic, anatomical level of delamination within solid wood sections to an examination of the interface of wood and its surface coatings. It provides readers with the perspective of industry as well as laboratory and is thus a highly practical sourcebook for wood engineers working in manufacturing as well as a comprehensively referenced text for materials scientists wrestling with the theory underlying the subject.