Abstract
This study tried optimization of the design parameter of an ultra-thin flat plate dynamic speaker unit as an example of high flexibility of the products design. We derived the regression formula of the sound quality effect of each design parameter by the design of experiments and the multiple linear regression analysis, and the evaluation criteria was decided by the Analytic Hierarchy Process (AHP). The optimal combination was searched using the regression formula and the evaluation criteria from the combination of 4800 kinds of design parameters which can be manufactured. As a result, the combination of these higher ranks satisfied simultaneously some sound quality characteristics required for a speaker. Further, we made the prototype of the same specification as them, and they were compared with the predicted value. They had high accuracy to the predicted value. These results suggests that, though the optimum design is difficult by experience and intuition, it can be performed comparatively easily using the regression formula from the design of experiments and the evaluation criteria by the AHP.
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