Propozycje rozwiązań filtrowania sygnału w elektronicznych systemach przekazywania dźwięku
Proposals for signal filtering solutions in electronic sound transmission systems

Summary/Abstract: Proper perception of sounds in the work environment, most often auditory danger signals, but also verbal warnings from co-workers, increases the degree of safe stay in the workplace. Hence, it is important that the properties of the sound transmitted to an employee with the use of electronic systems are as best as possible adapted to the possibility of its perception by that employee, taking into account the acoustic conditions in the place of use of such systems. Adjusting the sound properties can be realized by influencing the frequency response of the signal, i.e. its filtering. The aim of the article is to propose solutions that could potentially be used in an electronic system of transmitting sound to an employee, enabling filtering of the signal in frequency bands. The requirements for the properties of measurement octave-wide band filters were analysed. The implementation of filters with a centre frequency ranging from 125 Hz to 8 kHz with the use of digital filters in the sound processor was carried out. The high degree of compliance of the characteristics obtained in the implemented solution with the standardized measurement characteristics indicates the suitability of the proposed solution for use in sound transmission systems to an employee.

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