Read e-book online Acoustics of Wood PDF

By Voichita Bucur

ISBN-10: 3540261230

ISBN-13: 9783540261230

ISBN-10: 3540305947

ISBN-13: 9783540305941

From the studies of the first edition:

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

CAS magazine, USA

"...[T]he writer has performed an admirable task, amassing, organizing, and reviewing the disparate literature on such a lot points of the Acoustics of Wood."

Journal of the Acoustical Society of the USA, USA

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Extra resources for Acoustics of Wood

Example text

Cremer and Muller (1982) demonstrated that “it is possible to accomplish some predetermined acoustical design objectives by selecting the enclosure surfaces to absorb, reflect or transmit the incident wave. ” Similar statements have been advanced by all acousticians involved in architectural acoustics (Beranek 1960, 1962; Egan 1988). Sound absorption and sound reflection efficiency over the audible spectrum are strongly related to the internal structure of the material, surface treatment, type of mounting, geometry, etc.

Measurements were performed on disks of 31−101 mm diameter and 2−11 mm thickness, in frequency ranging from 90−6,500 Hz. The specimens were cut along their principal axes and at different angles versus the principal directions and were submitted to the sonic field. 1 shows the variation in absorption coefficient versus frequency for maple of several specimens, the first in the longitudinal radial (LR) plane at α=0°, the second in the same plane at α=90°, and three others at intermediate angles of 23°, 45°, and 67°.

6 s. Timbre-related effects, recorded on the spectrum of sound levels in three concert halls (Amsterdam, Boston, and Vienna), were largely commented on by Bradley (1991). 6. 7 presents the complex structure of the module of a coffered ceiling. Maximum absorption was obtained at 200 Hz. This maximum is probably due to the mass of the plates and the stiffness of the air cushions; on the other hand, it might be due to the resonance frequencies of the wooden elements. This type of wooden structure shows the “favorable influence on acoustics of wooden paneling, wooden stages and vibrating wooden floors.

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Acoustics of Wood by Voichita Bucur

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