Download Acoustics of Wood by Voichita Bucur PDF

By Voichita Bucur

ISBN-10: 3540261230

ISBN-13: 9783540261230

ISBN-10: 3540305947

ISBN-13: 9783540305941

From the experiences 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, accumulating, organizing, and reviewing the disparate literature on such a lot facets of the Acoustics of Wood."

Journal of the Acoustical Society of the US, USA

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5 m height) had the highest attenuation at frequencies >2,000 Hz, and the lowest attenuation at frequencies <125 Hz. It seems that at high frequency the scattering and absorption of the trees play an important role, whereas at low frequencies the effect of the ground is more important in sound attenuation. Sound transmission through vegetation foliage in an anechoic chamber was studied with species originated from temperate and tropical zones. The foliage acts as a filter for the noise. At the mid-frequency range (<2 kHz) the noise is slightly amplified, and at high frequencies the noise is attenuated.

Bucur and Muller 1988, with permission) swarm of observation points and the vectors corresponding to the density and velocity are presented in Fig. 10. Germinated acorns are mostly structured around their proper inertia center in the first quadrant, whereas the nonviable acorns are structured around another center in the third quadrant. For acorns of the same size and weight, the velocity could be a discriminant parameter able to detect delamination between successive layers of the acorn envelope.

The authors stated that the profile of the frequency spectra of the impact noise of a tapping machine and tire drop are very different, but their radiation factor spectra are almost the same. Nakao et al. (1989) proposed some improvement in the reduction of floor-impact sound levels in the receiving room. The floor−ceiling−wall system was re- 26 Wood and Wood-Based Materials in Architectural Acoustics Fig. 3. Sound transmission loss vs frequency in different materials: a plywood; b particleboard; c hardboard.

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