Researches were made in year 2010 on chainsaw operator, tractor driver, harvester operator and forwarder operator. Objects were located at the area of Slovenian high carst in GGO Kočevje. Noise loads were measured by felling on chainsaw and harvester and by timber harvest on skidder and forwarder. This gradual thesis presents overall structure of loads by noise by working operations and modular loads (8h). Calculated modular loads by noise were compared with valid standards. The analyzes of results show us that noise loads emited by chainsaw (95,6 dB(A)) and by tractor (83,8 dB(A)) were above lower day limit of noise exposure (80 dB(A)). On the other hand, harvester operator (68,2 dB(A)) and forwarder operator (66,9 dB(A)) were not over loaded by noise.