Direct sound transmission
DOI link for Direct sound transmission
Direct sound transmission book
This chapter looks at predicting and interpreting features that describe the airborne and impact sound insulation of various building elements. Splitting up a building into its component parts is a convenient way to approach calculation of the sound insulation; it also suits the way that designers and manufacturers approach the design of a building. It is important to note that Statistical energy analysis provides a framework for the analysis of complex systems; the classical theories of sound and vibration transmission can be, and usually are, incorporated within this framework. It already looks at non-resonant transmission across an infinite plate acting as a limp mass. At frequencies well-below the lower critical frequency and well-below any mass-spring-mass resonance, a rough estimate for the non-resonant transmission can be found by assuming that the closely connected plates act as a solid plate with the combined mass per unit area of the individual plates.