Search academic texts

Information × Registration Number 0306U001930, 0104U000395 , R & D reports Title The research and working out of selektive noiseproof ear protectors. popup.stage_title Дослідження та розроблення селективних протишумових навушників Head V.H.Sedykh, Registration Date 04-08-2006 Organization Special research and design institute popup.description2 Ihe objects of exploration are the means of individual defence of hearing orqans selective noisepoof heabphones (SNH). Ihe modeis and scale modeis of SNH are worked out, the laboratory tests are carried out. tlb construktive elements influence at SNH sound insulation was studied. Ihe construction of the experimental SNH sample was selected and the versions of setting the elements of total and selective sound muffling. Ihe effect of selective sonnd muffling is provided by changed chink absorber, which is plaeed into the headphone body and adjusted ot the freqnency band of 125-250Hz. Ihe ability of passing of the speech commands isprovided by sonndconducting openings on the body closed with the turning covers which can be regulated. Ihe setting of SNH bodies with head ark is carried out by two-point scheme. Ihe results of scientific-research experimental and constructive works are recommended for industrial production ofthe article.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close