Comparison of inverse methods and particle velocity techniques for transfer path analysis (TPA)
Direct sound field visualization is not always the best way to assess complex noise problems. Maps of sound pressure, particle velocity or sound intensity in the vicinity of a source might not be directly related to the pressure contribution for a given position. Transfer path analysis (TPA) has been implemented for many years to evaluate this case scenario, which requires using information about the environment and the sound source. Inverse methods commonly require a large number of transfer function measurements along with special measurement conditions. On the other hand, particle velocity methods rely on measuring the reciprocal transfer path and the velocity distribution of the vibrating surfaces directly. This paper presents the theoretical bases of the two principles and compares the advantages and disadvantages of the two methods applied to real industrial applications.
Comesaña, D.F., Holland, K., Wind, J. and de Bree, H.E., 2012, April. Comparison of inverse methods and particle velocity based techniques for transfer path analysis (TPA).