By Voichita Bucur
I've got came across this an outstanding ebook for figuring out a few facets of wooden utilized in musical device making. It confirms a few of the conclusions reached from useful adventure. I simply want there has been a bit extra that used to be proper to software making.
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Additional resources for Acoustics of Wood (Springer Series in Wood Science)
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. 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.
For example, plywood and particleboard provide sound absorption in the lower-frequency region of the audible spectrum (<500 Hz) and porous artificial materials are remarkably efficient absorbents at mid and high frequencies (2,000−4,000 Hz), as cited by Beranek (1960). This chapter attempts to cover the following points: the influence of the structural organization of wood on the sound absorption characteristics, wood-based materials as sound insulators, and some aspects related to the utilization of wood and wood-based composites in room acoustics.
Above Schematic representation of sound propagation between adjoining rooms. (Beranek 1962, with permission). Below Schematic representation of incident acoustic energy (Ee) on a wall and corresponding transmitted (Ed), absorbed (Ea), and reflected (Er) energies. (Braune 1960) sonic energy in the anisotropic planes of wood LR or longitudinal tangential (LT), the absorption coefficient is small and quite constant for all frequencies. 2 Wood Materials as Acoustical Insulators Wood was and still is a basic building material.