Exploring Reciprocity method to measure radiated sound during a standard impact test

The existing standard measurement method to obtain the performance of a floor-ceiling assemblies for footstep noise suffers from several problems, especially the non-reproducibility due to room modes at low-frequency one-third octave bands, and the lost information on the input force. This makes it difficult to evaluate and compare one floor-ceiling assembly with another. In this work, we are exploring an alternate approach to obtain a frequency response function based measurement of a floor ceiling assembly by using a speaker as an input source and acceleration as a measured response. For a simulation model and for a concrete structure tested for this work, this reciprocity method showed great success when compared to a force input and a microphone response frequency response function.