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An experimental setup for validation of the plane wave methods

Liet, S.R. (2024) An experimental setup for validation of the plane wave methods.

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Abstract:Experiments are described which will serve to validate the, so called, plane wave decomposition(PWD); a method to measure in-situ absorption coefficients. A box (setup) has been build which consists of a cavity and a loudspeaker. The horizontal dimensions of the cavity can be altered, whereas, for simplicity, the height of the box has been designed to be sufficiently low. This is done to ensure a 2 dimensional sound field within the box. At various positions in the box, a number of closely spaced microphones have been used to measure the acoustic pressures within the cavity. Two methods have been implemented to derive the particle velocity from these measurements; one method is based on 2 microphones and one, a more accurate method, is based on 3 microphones. The results of the calculations of the experimental tests are compared with the results of the calculations of the simulated tests.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:https://purl.utwente.nl/essays/98530
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