Download Acoustics of Wood by Voichita Bucur PDF

By Voichita Bucur

From the studies of the first edition:

"It would certainly stay the main finished paintings during this box for a very long time to return. It belongs at the bookshelf of each fabric scientist and structural engineer."

CAS magazine, USA

"...[T]he writer has performed an admirable activity, gathering, organizing, and reviewing the disparate literature on so much facets of the Acoustics of Wood."

Journal of the Acoustical Society of the USA, USA

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Extra info for Acoustics of Wood

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Part II Material Characterization 3 Wood and Wood-Based Materials in Architectural Acoustics Owing to the interaction between acoustics and architecture, it may be helpful, before considering the capacity of wood and wood-based materials as acoustic insulators, to survey the field of human reaction to sounds. The threshold of human hearing is limited at 0 dB, the equivalent of the pressure of 2×10−5 Pa (Beranek 1986) or to an energy of 10−16 W/cm2. The limit of human pain induced by the noise is at 120 dB or 20 Pa or 10−4W/cm2.

3 Wood and the Acoustics of Concert Halls There are many cases of the improvement of room acoustics when wood material is used. Moreover, it has been recognized that the acoustical quality of rooms is a matter of subjective judgement. Even today, the design and construction of a concert hall can be defined as «an art» in the classical meaning of the word, despite the fact that scientific knowledge in this field is advanced (Muller 1986). The sound field in a real room is very complicated and it is not open to exact mathematical treatment.

11). For transverse isotropy, the material may possess an axis of symmetry in the sense that all directions at right angles to this axis are equivalent. The corresponding stiffness matrix (Eq. 12) contains five independent constants (C11, C22, C55), four diagonal terms and two off-diagonal terms (C12, C13). It can be shown that the transverse isotropy is a particular case of an orthotropic solid. The terms of the independent elastic constants are given below for the solids exhibiting different elastic symmetry.

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