Reciprocal Measurement of Transfer Functions Using a Volume Velocity Source
Reciprocal Measurement of Transfer Functions Using a Volume Velocity Source
This diploma thesis deals with the reciprocal measurement of reciprocally measured transfer functions with special regard to vehicle measurements. The principle of reciprocity is presented as well as its limitations and validity constraints. Simple validation measurements are performed in order to completely understand and verify existing theories. Afterwards the verified approach is applied to a complex acoustic environment such as a vehicle. In order to support measurements and simplify data evaluation a Matlab tool is implemented which calculates the transfer function from the volume velocity source (determined from two microphones in the source) to the sink. Furthermore different excitation signals eligible for this method are discussed.