The master thesis describes the process of ultrasonic welding of non-ferrous metals. The work aims to propose a design solution suitable for reducing the level of noise generated during ultrasonic welding of non-ferrous metals. The work is divided into a theoretical and a practical part. In the theoretical part, I describe ultrasound as a part of the sound and the process of ultrasound welding, specifically the welding of non-ferrous metals. I deal with the level of noise in the given welding method. From the point of view of the possible risk of damage to the hearing of the operator of the welding equipment, I take care to comply with the permitted noise regulations. The practical part focuses on the structural solution to the issue of noise reduction during ultrasonic welding following compliance with the required equipment parameters. Parametric and design information of the ultrasonic welding equipment is also included in the work. The result of the work is an analysis of the noise of the device.