The utility of loudspeaker driver models is enhanced when a lumped parameter representation is supplemented with the parameters of a surface vibration representation. While the lumped model has a one-dimensional representation of input and output, the surface model considers multiple points on the surface as each contributes to the sound pressures of the receiving point. This article explores how to measure and parameterize the distributed points on the surface of various elements using a measurement grid of about 100 points.
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