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Sound Source Localization Using Sound Intensity Measured by a Three Dimensional Pu-probe

With use of a three-dimensional particle velocity and pressure sensor the active sound intensity can be measured. A simple three-dimensional calibration method of such a sensor is described along with different methods for measuring direct particle velocity and active sound intensity in the far field in a reverberating room. The mean sound intensity can be calculated out of the product of the instantaneous pressure and particle velocity, but also out of the calculated direct pressure and direct particle velocity. In case of an ideal situation the sound intensities are the equal in magnitude and direction, differences yield information about the error and can help increase accuracy of measurement.

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