The invention is about the development of a device and its methodology for measuring the active and reactive sound intensity from the impedance computation. The active intensity is calculated directly in the frequency domain multiplying the complex impedance and power spectrum of the air particle velocity. A second line of post-processing is applied to obtain the overall complex sound intensity. The overall active intensity is calculated as the sum of each frequency component of its spectrum, while the overall reactive intensity is obtained as the difference between the overall apparent intensity and the overall active intensity.
Minimization of the experimental error in any acoustic field.
Unambiguous and physically correct definition of the complex sound intensity based on the impedance computation
Calculation of the spectral distribution of the radiative and oscillatory forms of acoustic energy.
Computation of the total reactive intensity
Italy, EPO