An Application of the Inverse Method in the Vibroacoustic Analysis of Industrial Rooms

Abstract

The problem of identication and localization of sound sources inside industrial rooms, including cases when the density of sound sources is considerable, can be solved by application of inverse methods. The experimental knowledge about the distribution of acoustic eld in the neighborhood of the examined object, followed by the reversal of the model used for sound generation and propagation, leads to evaluation of the object's acoustic power. For the cases when determination of the rooms' acoustical properties is required the combination of the inverse method with the boundary elements method allows the calculation of acoustic impedance for the surface delimiting the examined room. The paper presents the prospects of the inverse method application in the mentioned vibroacoustic problems.

Synthesis of Uncorrelated Acoustic Quality Evaluation Indices of Buildings

“…SVD decomposition is applicable in various elds of science such as diagnostics [11] and vibroacoustics [12,13]. SVD is often selected as a method for solving linear problems of least squares [14]. The SVD method, similarly to factor analysis, and, in particular, the principal component analysis method (PCA) make it possible to transform the correlated data set into uncorrelated data without loss of any information.…”

Determination of Acoustic Impedance of Walls Based on Acoustic Field Parameter Values Measured in the Room

“…It seems advantageous to carry out the measurements using multi-channel data acquisition systems for acoustic signals. The authors have combined experimental methods [2,3] with numerical modelling of acoustic elds that allowed the determination of acoustic impedance for the surfaces enclosing the analyzed volume of acoustic eld [4,5]. The purpose of the study was to analyze the acoustic properties of industrial-type rooms using the inverse methods.…”