The Development of Active Personal Protective Equipment Design Technologies

摘要

This research exposes the designing technology of analogue active personal hearing protective equipment. The achievements overview and following stages of the design include substantiation and calculation of quenching wave formation circuit, component selection , scheme performance testing based on computer-aided means, designing of three-dimensional model of headphones based on the technical characteristics and the weight and size. Testing of experimental model of headphones in three different versions of the concept is carried out to evaluate the effectiveness of noise reduction in standardized octave bands. The test result showed that the analogue headphones have the effectiveness of the noise reduction of 32 dB, which is comparable with the digital type of active headphones produced by Peltor Company.