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Loudspeaker Transduers with an Alternative Tubular Form Factor

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Three different multi-diaphragm loudspeaker transducers with a tubular form factor are investigated. The transducers consist of a conventional motor structure, a tubular housing, and multiple diaphragms. In one design, sound is generated by the relative motion between a housing that is driven by a single motor and diaphragms that are attached to the housing via flexible surrounds. In a second design, a single motor drives one set of diaphragms and sound is generated by the relative motion between the diaphragms and the fixed housing. In the final design, two motors are used to drive two sets of diaphragms in opposition and sound is generated by the relative motion between them.

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