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 data obtained is analyzed using a FFT.  The phase of the sound wave is calculated, and the slope of the position versus phase graph is used to calculate the speed of sound. This high correlation shows that the data obtained is correct, but the numerical method for analyzing the data is incorrect.

Failure of cross-correlation phase measurement technique

247th National Meeting (2014)

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