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A Balanced Modal Radiator (BMR)

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The goal of a practical loudspeaker that behaves like the "perfect point source" has been long sought. Mathematical analysis shows that the general prototype for such a device does indeed exist, but it does not point to an obvious embodiment. Using this prototype, a practical flat diaphragm loudspeaker is developed, which has a substantially flat on-axis pressure response, as well as a smooth and extended power response. A fully-coupled FEA model is used to investigate the intrinsic characteristics of this radiator in both the mechanical and acoustical domains. Measurements from a real prototype loudspeaker illustrate the practicality of the method.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=13290

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