1. A method of classification of sound-generating processes, comprising: detecting sound signals generated by sound-generating processes; extracting characteristics from detected sound signals for respective process; calculating a similarity between the detected sound signals based on extracted characteristics; grouping processes with sound signals similar to each other into process clusters; creating an adapted model by adapting statistical distribution parameters of a reference model based on statistical distribution parameters of processes contained in a process cluster with a highest number of processes grouped; and classifying the sound-generating processes based on the adapted model.