Xiang, "One-dimensional transport equation models for sound energy propagation in long spaces: Theory", J. Acoust. Soc. Am., 127 (2010), pp. 2312-2322.Y Jing and N Xiang. One-dimensional transport equation models for sound energy propagation in long spaces: Simulations and experiments. The...
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Reverberation is the persistence of sound within a space after the initial sound source has ceased. RT60, a measure of reverberation, is the duration required for the average sound energy density in a space to reduce to one millionth of its original value following cessation of the ...
This paper presents an alternative model for predicting the reverberant sound field in empty rooms with diffusely reflecting boundaries, based on the generalization and the numerical implementation of a diffusion equation for the energy density. The paper focuses on the source term and the boundary co...
The process of reflection takes place continually, and the sound is built up into a sound field known as a reverberant field. If the source of the sound is cut off, the field decays. The amount of time that it takes for the sound energy density to decay by a factor of 106 (i.e.,...
One intuitively thinks of sources as active mechanisms that generate sound energy; but inclusion of a term in the right-hand side of Eq. (6.5) should not necessarily be assumed to bear this connotation. For example, when incident sound falls upon the ‘rigid’ concrete floor of a room, ...
Sound energy distribution patterns within enclosed spaces are the basic concerns of architectural acoustics. Energy decays are analyzed for major acoustical parameter estimations, while spatial energy distribution and flow vectors are indicative in the analysis of sound energy circulation and concentrati...
RT60 is the measure for reverberation, and it is defined as the amount of time required for the average sound energy density in a space to decrease from its original value by 60 dB after the original sound has stopped. 准确计算混响时间RT60时,需要注意以下关键因素: ...
We revisit the theoretical priors used for inferring Dark Energy (DE) parameters. Any DE model must have some form of a tracker mechanism such that it beha
An empirical fundamental equation of state in terms of the Helmholtz energy for tetrahydrofuran is presented. In the validity range from the triple-point temperature up to 550 K and pressures up to 600 MPa, the equation of state enables the calculation of all thermodynamic properties in the liqui...