Parametric Study of a Continuous Scanning Method Used to Characterize an Acoustic Field
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A novel approach utilizing the acoustic emissions of a vibrating source is developed to analyze the relationship between the source characteristics and its acoustic field. In previous work, the authors presented a new methodology for sound field characterization based on a Continuous Acoustic Scanning (CAS) approach. As a part of that work, the feasibility of the proposed method was established by validating the theory developed by a roving microphone experiment. The CAS approach utilizes the side bands in a fast Fourier Transform (FFT) of the time-based-data collected by a roving microphone. The present work herein, is an extension and in-depth study of the different parameters affecting these side bands.The work presented in this paper simulates a continuous acoustic scan of a simple-source dipole. Various parameters affecting the acoustic field characterization are studied. The variables considered in this paper include the distance between the microphone and the sound source, the roving speed of the microphone, the length of the sweep and the amplitude of the dipole velocity.
