Theoretical substantiation of acoustic cavities in the construction of wooden slabs

The paper presents a study of the design of acoustic characteristics of a soundproof wooden panel. The growing need for effective noise control strategies in various applications, such as wooden house construction, has led to the development of innovative sound insulation materials. This study examines the incorporation of sound- absorbing elements into wooden panels to enhance their sound insulation properties. The theoretical basis for the use of acoustic cavities is based on the principle of acoustic resonators. In the presence of volumetric cavities in the structure, it becomes possible to create resonant phenomena that can significantly affect the sound pressure level and damping of sound waves. Resonation occurring at certain frequencies helps to reduce the intensity of sound, which improves the acoustic characteristics of the finished structure. The design process takes into account the choice of sound-absorbing elements and their integration into the construction of wooden panels. Various sound-absorbing materials such as porous absorbers, microperforated panels and resonant cavities are evaluated in terms of their sound absorption coefficients. The optimal configuration is determined by modeling and experimental measurements using standardized methods defined in GOST 27296-2012 «Buildings and structures. Methods for measuring the sound insulation of enclosing structures». The manufacturing technique involves the integration of sound-absorbing elements into the construction of a wooden panel while maintaining its structural integrity. The developed soundproof wooden panel offers a universal solution for noise reduction, opening up new opportunities in wooden house construction projects. The use of new types of wood slabs will significantly improve the construction technology and the level of acoustic comfort. To study the reduction of sound pressure, special sound-insulating wood panels with internal structural elements in the form of parabolic cavities that contribute to sound absorption were used. This study examines the introduction of sound absorption elements into wooden panels to improve their noise protection properties. By introducing parabolic recesses (or «sound pockets») into a wooden panel, its sound insulation properties can be significantly improved. These structural elements, made by milling, contribute to sound absorption and reduce the sound conductivity of the panel. Parabolic recesses reflect, absorb and disperse sound waves, reducing the transition of sound through the material, which helps to reduce noise levels and improve acoustic comfort in the room where this panel is installed.

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