Download e-book for kindle: Acoustics of Wood by Voichita Bucur

By Voichita Bucur

ISBN-10: 3540261230

ISBN-13: 9783540261230

ISBN-10: 3540305947

ISBN-13: 9783540305941

From the studies of the first edition:

"It would definitely stay the main accomplished 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, amassing, organizing, and reviewing the disparate literature on such a lot facets of the Acoustics of Wood."

Journal of the Acoustical Society of the USA, USA

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Sample text

The positions of these last elements are essential in keeping the frequency spectrum of the reflected sound similar to that of the direct sound. − The materials used for the construction. Wooden-plated panels in front of an air cushion are used for the absorption of low frequencies. Wooden plates act as resonators, whereas the basic resonance frequency is related to the mass per square unit and to the stiffness of the air cushion behind. Wooden linings lead to a bright sound because of low-frequency absorption.

Expected to exhibit transverse isotropy. The discussion is based on the data presented in several fundamental references (Love 1944; Hearmon 1961; Green and Zerna 1968; Jayne 1972; Bodig and Jayne 1982; Guitard 1987). First we consider the orthotropic symmetry of solid wood. The terms of the compliance matrix are given by Eq. 14) The physical significance of the compliances is as follows: − S11 S22 S33 relate an extensional stress to an extensional strain, both in the same direction. For the particular symmetry of solid wood this relation gives the Young’s moduli EL , ER, and ET.

Wooden linings lead to a bright sound because of low-frequency absorption. Other systems such as Helmholtz resonators and thin gypsum plates can be used for this purpose, with more or less success. ) and the volume of the air. » The subjective preference of the sound in concert halls is related to the psychoacoustic parameters, as defined by Ando (1985): the preferred initial-time-delay gap, the preferred listening level, the preferred reverberation time subsequent to the arrival of early reflections, and the magnitude of the preferred measured interaural cross correlation.

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Acoustics of Wood by Voichita Bucur

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