00661naa#a2200193#i#450# EN\\bibl\68575 20241219155516.4 2307-7476 20140325b2014####ek#y0engy0150####ca RUS RU APPLICATION OF THE METHOD OF POLYSPECTRAL ESTIMATION OF INFRASONIC SIGNALS WITH HYPERBOLIC SYMMETRY FOR DETECTION OF PEOPLE IN BLOCKAGES Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2014 8 с. Journal article local Bogdanova E M Ivanov A N Rodin V N journals.igps.ru