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Wednesday, April 26 • 12:30pm - 2:00pm
Acoustic Frequency Response of Open Tubes

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A lock-in amplifier is used to determine the acoustic response a system over a range of stimulus frequencies. The lock-in amplifier implements this by simultaneously creating a stimulus at a selected frequency, recording the resulting response, and isolating the part of the signal that is produced at the incident frequency. This gives information about the resonant frequencies of the analyzed system, which is useful for determining the system’s acoustic properties. For this particular project, we will be using the lock-in amplifier to measure the resonance frequencies of open tubes of various lengths. Additionally, tube-like systems such as corrugated tubes, tubes connected in T-joints, and tubes partially submerged in water can be analyzed using this technique. A better understanding of the acoustic properties of these systems is useful because they are similar to several real world systems such as heart stents and oil pipelines.

Wednesday April 26, 2017 12:30pm - 2:00pm PDT
Concourse - Wilma Sherrill Center

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