Human joint examination is one of the most important areas of study in orthopedics and rehabilitation. It helps classify the condition of patients, particularly in old age or after an accident. The analysis of joint conditions is crucial in determining the most effective treatment to facilitate a quick return to a normal or improved everyday life. The diagnosis of joint states typically relies on various methods such as X-Ray, CT (Computerized Tomography), MRI (Magnetic Resonance Imaging), USG (Ultrasonography), or Arthroscopy. However, these methods require expensive, stationary devices, specific workplaces, and qualified staff. In this study, the authors present an alternative, innovative, inexpensive, and portable device that detects the sound emitted from joints during movement. This device allows for synchronous recording of signals from four areas of one joint or from four different joints from the skin surface above them. The method is noninvasive and does not require a specific workplace, although a quiet environment is necessary during the study. The instrument was initially tested on knee joints but is intended for use on all human joints, especially larger ones such as the shoulder, elbow, hip, knee, and ankle. The development of this new device is part of an entirely new diagnostic method that involves recording the sounds emitted from joints, measuring those signals, and using spectral analysis on the signal. This innovative analysis will aid in quicker and more autonomous patient diagnoses while also providing the possibility for objective result comparisons.