[22] studied barriers from various recycled plastic and found their performance to be better at lower frequencies (100 to 250 Hz). The combination of type rubber, PVC grains, and nylon fibres with polyurethane as a binder resulted in a good absorption coefficient [23]. Another way to improve the performance of the noise barrier was to change its shape using additional elements on the top of the barrier, made from different materials, such as T-shaped and Y-shaped caps [24; 25], cylindrical caps [26; 27], multiple-edge caps [28], and tilted caps [29]. These design variants changed the effective acoustic length of the barrier or modified the diffraction points of the screen. Additionally, the application of scattering acoustic barriers in cities was studied. It aimed to reduce the transmitted transport noise that affected buildings [30]. Corrugated or fluted panels have experienced an increasing number of applications as construction elements for roofs, claddings, and walls of modern industrial buildings and acoustic road panels. The range of profile shapes may be large and intended for different situations. As corrugated and fluted panels are so widely used for industrial applications, their acoustic parameters are of considerable interest. Engineers need this information to estimate the expected community noise levels at the building or construction design stage. Corrugated or fluted panels are referred to as orthotropic because they are stiffer along one direction than the other. [PERSON] [31; 32] analyzed sound transmission through orthotropic panels. He derived some approximate solutions for the transmission coefficient for panels of the infinite extent, with the effects of panel damping neglected. The earliest works focus on the calculation of moments of area of the profiled metal sheet [33], on the sound absorption and TL of single metal skin cladding with varying profiling and thickness [34], on the dependences of the profile to critical frequency [35], or the application of finite element and boundary element analysis to predict the TL of a corrugated and fluted steel sheet [36]. Because of the development of the plastics processing industry, those materials are used even more frequently. Manufacturing specifics and material additives cause the acoustical parameters for different plastics to remain in the cognitive phase. Therefore, the major goal of this paper focuses on an experimental study of the absorption coefficient and transmission loss of fluted PVC panels, considering the panel size and thickness. Such panels are commonly used in construction engineering, so their acoustical parameters with no absorption material are also important. Through the development of the plastics processing industry and the possibility of the creation of the new shapes of panels, this industry now creates new materials for wide applications. So, the acoustical parameters of such materials are important in technical use. In our studies, the Z-type and \(\Omega\)-type corrugated panels, with special strength and patented joining between single modules, were studied as potential acoustical materials. Transmission loss and absorption coefficient were measured using ISO methods. The experimental results of transmission loss (TL) are compared with [PERSON]'s theoretical model to calculate the TL widely used in the fluted/corrugated/ribbed panels for checking this model for the tested panels. The quick conversion of the loss coefficient through the use of a simple theoretical model could replace experimental studies and also computer simulations. Discovering the acoustic parameters of single fluted PVC panels will allow for finding an idea or method for improving their sound insulation capacity.