The specific features of sound insulation of building constructions used for partitions in buildings

Abstract

The article deals with one of the numerous properties that have an impact on the sound insulation of building constructions, namely, the angle of wave incidence onto the partition (construction). Sound pressure on the area of the partition may be the same, whereas the amplitude of oscillations gets changed throughout the whole area of the partition. The article explores in what cases sound will pass most strongly through the partition of finite dimensions when spacel-frequency resonance occurs. Investigation showed that changes in the angle at the same frequencies created the opportunity for manifestation of alternation of maximums and minimums in the motion of plate amplitudes. This quality, at the sound transmission through the plate of finite dimensions, confirms the rightfulness of the division of the curve of frequency dependence of sound insulation into three ranges of frequencies with the different intensity of sound transmission.