Comparison of inverse methods and particle velocity based techniques for transfer path analysis

International audienceDirect sound field visualization is not always the best way to assess complex noise problems. Maps of sound pressure, particle velocity or intensity in the vicinity of a source might not be directly related to the pressure contribution for a given position. Transfer path analysis has been implemented for many years to evaluate this case scenario, which requires using information of the environment and the sound source. Inverse methods commonly require a detailed geometric description of the problem along with sound pressure measurements. On the other hand, particle velocity methods rely on measuring the reciprocal transfer path and the velocity close to the sources. 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