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Information × Registration Number 0306U008050, 0104U000394 , R & D reports Title The research and working out of noiseproof ear protectors popup.stage_title Розроблення засобів шумоглушіння для пневматичних пристроїв технологічного устаткування Head V. N. Sedykh, Registration Date 08-09-2006 Organization Special research and design institute popup.description2 The aim of the exploration - creation of the means of individual defence of hearing organs (NH). The constructive elementes influence at the sound insulation was studied useing the models and scale models.The method of the exploration is the method of the standing wave in the acoustic interferometer (GOST 12.4.051-87). The experimental NH samples are worked out and made.The preliminary and receiving tests were carried out. The accordance of the acoustic efficiency and characteristics of the product to GOST 12.4.051-87, group B were revealed during the tests. The products are recommended for industrial production.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close