Using bearings as an example, key indicators of their performance include vibration, temperature, bearing noise, and the lubricant condition. The bearing itself does not generate noise, but bearing noise can be defined as the sound effect of vibrations that are generated directly or indirectly by the bearing in the surrounding structure. As the bearing wears out, the level of vibroacoustic signals increases. Vibroacoustics, as a method for examining the condition of bearing nodes, provides information about the technical condition of the machine. Vibroacoustics can also be used as a diagnostic method in medicine. Vibroarthrography of the knee joint involves measuring the sounds and vibrations produced by the joint during movement [3]. The first study on the use of sound diagnostics generated by the knee joint was conducted by [PERSON] over 100 years ago. This method involves auscultation of the knee joint, focusing on the sounds made by normal joints, as well as their changes during repetitive movements, in which a relationship has been noted between age and increased sound activity [4; 5]. One of the largest and most heavily loaded joints in the human body is the knee joint, and it is also one of the most complex structures in the musculoskeletal system. It consists of structures whose relative movements influence the creation of the VAG signal [6]. From a mechanical perspective, its main function is to allow for the movement of the bones that connect. It has the ability to carry loads equal to several times the body weight. During the movement of knee extension and flexion, three types of movements occur. The first is the rotation of the lower leg around its long axis, the next type of movement is the rotational, hinge-like movement, and the third type is the anteroposterior sliding movement [6; 7]. Cartilage covers most of the mating surfaces of the knee joint, which provides movement with minimal friction [8]. The human knee joint is a biobearing whose friction surfaces are covered with an elastic material (joint cartilage), and a joint capsule filled with a lubricating substance, i.e., synovial fluid, surrounds the joint. The anatomical location of the knee joint, its complex structure, and its ability to withstand significant loads make it highly sensitive to damage and injury. This may lead to damage to its anatomical structures, which may cause irreversible changes in the joint structure and the development of degenerative changes [9; 10]. The disappearance of the synovial fluid leads to an increase in the coefficient of friction and, consequently, to the generation of more vibrations and sounds that can be measured using vibroarthrography. The stimulated synovial membrane increases the production of synovial fluid, which contains pro-inflammatory cytokines, which further damage the joint cartilage. Osteoarthritis can be a factor in increasing the coefficient of friction, which leads to increased wear on the knee joint. As cartilage damage increases, cracks develop. Degenerative changes also result in an increase in the frictional moment, which has a direct impact on additional load on the joint and may lead to its further degradation. Damage to joint cartilage is also associated with uneven distribution of tangential stresses, which leads to an increased risk of further damage and pain. Osteoarthritis (OA) is a severe and progressive joint disease that usually affects middleaged and elderly people. OA involves the progressive degeneration of joint cartilage, which can affect the entire joint, the synovial membrane, and the underlying bone [11; 12]. The basis for the development of the knee joint OA is damage to the articular cartilage [13; 14]. Changes that occur in both the articular cartilage and the subchondral layer of bone and the synovial membrane may lead to failure of the musculoskeletal system [14; 15; 16]. With the development of knee joint OA, the mechanical parameters of the cartilage covering the joint surfaces change.