Noise is one of the serious modern problems that people face today, given the high level of urbanization and mobility of citizens. One way to solve the noise problem is to strengthen and apply legal regulations that accurately determine the permitted noise level for a particular area. In addition to legal regulations for noise protection, there are legal norms of standards that are applied in the field of noise protection: HRN ISO 1996-1 and HRN ISO 1996-2. A great responsibility for the protection of workers lies with the employer, who must be well aware of the dangers and safety measures at work, as well as the harmful effects. The entire process of occupational safety is based on elimination, prevention and reduction of harm. The practical part of the work refers to noise measurement with the help of applications and the Metrel instrument. A forestry truck with a crane was included in the analysis, and an analysis of the noise measurement on that crane was performed at three locations in accordance with legal regulations related to safety and protection at work. In the work, a measurement was carried out with two applications and a sound level meter for idling and during operation (truck cranes) outside the scope of the machine (approx. 10m) for a duration of 1 min. truck and trailer, at a distance of 1 meter. By comparing the Metrel Multinorm MI 6201 sound meter and mobile applications (Sound Meter and Sound Meter), it was determined that there are some deviations in the measurement. The results of the measurements showed that the Sound Meter application shows a lower noise level compared to the sound level meter, which does not really inspire confidence in this application even with the first measurements.