Investigation of volume velocity source based on two-microphone method for measuring vibro-acoustic transfer fuctions (bn0439)

Measurement of transfer functions is required for most applications dealing with source-path-contribution techniques often called transfer path analysis. Here the transfer function, typically measured as Frequency Response Function (FRF), takes the role of connecting an input (eg source position) with an output (eg receiver position). In this paper we will further investigate a previously described low-mid frequency volume velocity source based on the two-microphone method for in situ measurement of volume velocity source strength. This investigation includes the effects of the acoustical environment when measuring transfer functions. The two strategies, direct and reciprocal measurement, will also be compared to investigate their validity for a typical acoustical setup. Finally we will compare the described volume velocity source with a mid-high frequency sound source based on the same two-microphone method.