Event Title
Failure of the Cross-Correlation Measurement Technique
Faculty Mentor
Kenneth McGill
Keywords
Kenneth McGill
Abstract
A sound wave propagates through a pipe which has 8 microphones attached at equally spaced intervals, 0.01016 m apart. The numerical method used to solve for the phase component, the Cross Correlation method, produces a high correlation value, but the speed of sound varies to a great degree. The method includes a Fast Fourier Transform of the experimentally obtained data to calculate a solution for the phase of the sound wave. The position versus phase graph is plotted, and the slope is used to determine the speed of sound. The high correlation value indicates precise data, but shows faults in the selection of theoretical method used to calculate the speed of flow through the pipe. A proposal is presented for future exploration into the problems uncovered in this research investigation.
Session Name:
Poster Presentation Session #1 - Poster #41
Start Date
4-4-2014 11:30 AM
End Date
4-4-2014 12:15 PM
Location
HSB 3rd Floor Student Commons
Failure of the Cross-Correlation Measurement Technique
HSB 3rd Floor Student Commons
A sound wave propagates through a pipe which has 8 microphones attached at equally spaced intervals, 0.01016 m apart. The numerical method used to solve for the phase component, the Cross Correlation method, produces a high correlation value, but the speed of sound varies to a great degree. The method includes a Fast Fourier Transform of the experimentally obtained data to calculate a solution for the phase of the sound wave. The position versus phase graph is plotted, and the slope is used to determine the speed of sound. The high correlation value indicates precise data, but shows faults in the selection of theoretical method used to calculate the speed of flow through the pipe. A proposal is presented for future exploration into the problems uncovered in this research investigation.