The experiment involves creating a sound wave that travels down a pipe with 8 microphones 0.4 in. apart. The numerical method of solving for the phase component using the Cross-Correlation method creates a very high correlation value but the speed of sound varies immensely. The method involves an FFT of the data, and then finding the phase of the sound wave, and finally using the slope of the position versus phase graph to find the speed of sound. This high correlation shows that the data is correct but the theoretical method for analyzing the data is incorrect. A proposal is presented for the next experiment to solve these problems that have confounded the researchers in this field.

Failure of the cross-correlation phase measurement technique

245th National Meeting (2013)

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