INNOVATIVE METHODS OF PRECISION ACOUSTIC MEASUREMENTS AND MODELING OF SOUND FIELDS IN CONDITIONS OF SPECIALIZED RESEARCH LABORATORIES

Abstract

In the presented research work, a comprehensive deductive and empirical assessment of modern methodological approaches to organizing and conducting precision measurements under the specific conditions of high-tech acoustic laboratories is carried out. The article deploys a large-scale theoretical basis that organically integrates the classical canons of wave physics and mathematical acoustics with the latest achievements in the field of multi-channel digital signal processing, wavelet analysis, and computer simulation modeling of complex sound environments. A detailed description of a series of controlled laboratory experiments aimed at verifying the accuracy of determining the sound-insulating, vibro-acoustic, and sound-absorbing characteristics of promising multi-layer composite materials and innovative building structures is provided. Special attention is paid to the deep study of the physical mechanisms of the formation of diffuse and free sound fields in specialized reverberation and anechoic chambers, as well as a systematic analysis of the influence of instrumental, methodological, and climatic errors on the final reliability and reproducibility of the results obtained. The scientific novelty of the research lies in identifying non-linear dependencies between the geometric and impedance parameters of the measuring boxes and the quality of low-frequency sound vibration registration under limited volume conditions. The practical value of the work consists in the development of an extended applied toolkit for optimizing the processes of acoustic design of industrial and civil objects in order to ensure the required level of cognitive comfort and effective protection of the population from intense anthropogenic noise impact.