Sound visualization tools are now widely used in industry. As a tool, acoustic cameras are also well suitable for faster identification of errors as well as individual states when operating devices. The aim of this paper was to locate and quantify noise sources on a packet sorting line using an acoustic camera and then to propose noise reduction measures. Localization of noise sources was performed by an acoustic camera with a microphone ring array. The result of these measurements and analyzes was to sort the individual noise sources from less noisy to the noisiest, which gives a good assumption for better planning of spending on the implementation of noise reduction measures. The outputs of these measurements also give information on the character and frequency composition of the sound of individual sources, which will help out in the design of specific noise measures.