진동-음향 성능 향상을 위한 스피커폰 인클로저의 형상 최적화

초록

This study presents a shape optimization methodology for reducing resonance-induced acoustic distortion in speakerphone enclosures. The enclosure lid was selected as the design domain, and its geometry was parameterized using cubic Bezier curves with a limited number of design variables. The optimization objective was defined as minimizing the root mean square (RMS) deviation of the sound pressure level (SPL) from a target level at the listening position over a target frequency range. The interior-point algorithm implemented in MATLAB's fmincon was employed, with gradients computed numerically via the forward finite difference method. Optimization results demonstrated the effectiveness of the proposed methodology through representative numerical examples. Analysis of the frequency response functions revealed that depending on the initial design, the acoustic performance improvements were achieved through redistribution of structural resonance modes and reduction of SPL response variations.

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