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A Low-Cost Intensity Probe
The sound intensity in a sound field can be determinated from two acoustical measurements method, the sound intensity is calculated by means of two spaced microphones. Another method, the p-u method, uses a pressure sensor to measure the sound particle velocity. Using the p-u method, measurements performed with a low-cost intensity probe and a computer soundcard combined with an open-source software show good agreement with results obtained with a p-p probe.
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