OPTIMIZATION OF NOISE PROTECTION CONSTRUCTION WITH SOUND-ABSORBING AND VIBRATION-DAMPING EFFECTS

摘要

The purpose of researches was the development of the pipeline wall construction exhibits both vibration damping and sound absorption properties. The specified construction is supposed to be used as an insert in the standard pipeline body. Fibreglass plastic is chosen as a base material of a construction. Due to rather low wave resistance of fibreglass plastic it is convenient for matching of the input impedance of insert wall with small acoustic resistance of the piped medium. The vibration-damping effect of the insert construction is provided by the intermediate layers of perforated rubber reinforced with fibreglass plastic.