Sound-Insulating Linings Modified Constructions of Technical Rooms

AbstractThe article presents the developed concepts of original noise reducing devices, made in the form of sound-insulating linings wall constructions of technical rooms where noise generation technical objects (the engine room of the sea craft, electric transformer substation closed type, compressor or diesel genera-tor station, etc.) are mounted. The technical result, achieved through the using of the developed noise reducing devices is to get rid of “expressed failures” in the frequency characteristics of typical sound-insulating linings constructions due to the resonant excitation of the lower (transversal, longitudinal) acoustic eigenmodes of air cavities formed by the front panels of sound-insulating linings with oppositely placed wall (ceiling) guards technical premises. For this purpose, the relevant quarter and half-wave design of acoustic resonators and/or sound-absorbing groups preformed separate modules, using crushed fragmented sound absorbers. These constructions are arranged at the appropriate spatial zones of air cavities of sound-insulating linings, where sound pressure antinodes of the lowest resonant acoustic eigenmodes are localized. This allows you to improve the technical, cost and environmental properties of used noise reducing devices