Laboratory work involving contact with harmful biological agents is a potential threat to both workers and the environment. Safe work in a microbiological laboratory is based on a combination of such elements as: properly conducted occupational risk assessment, correctly designed lab spaces (equipped with functioning apparatus and equipment), appropriate personnel qualifications, well selected personal protective equipment, and compliance with the principles of safe work with microorganisms that are a potential source of infection.

DOI: 10.54215/BP.2023.03.5.Golofit-Szymczak

The use of hearing protectors reduces the sound reaching the wearer's ears. As a result, the possibility of perceiving sounds, the perception of which is important in the environment of a worker's presence, is also limited. For this reason, solutions in the form of electronic systems built into hearing protectors are more and more commonly used, enabling the transmission of properly processed sounds under the hearing protectors. Solutions currently used in level-dependent hearing protectors offer the possibility of influencing the properties of the sound transmitted to the user limited to a simple adjustment of the general gain in the signal audio path. The aim of the article is to present the concept of the solution intended for use in a hearing protector and enabling the adjustment of the properties of the transmitted sound to the needs of the user, i.e. improving the reception of useful sounds. This is done by shaping the frequency response of the transmitted sound.

DOI: 10.54215/BP.2023.03.6.Mlynski