Design and Fabrication of Low Power Flat-Panel Loudspeaker
Two parts which include design and fabrication of low power flat-panel loudspeakers are studied in the thesis. The first part is about harmonic analysis and design of radiating panels using the finite element software ANSYS. The second part is about manufacture of loudspeaker components which includes suspension and elastic support, and the assembling of the loudspeakers. In fabricating the speaker, the soft suspension and elastic support are used to design the initial resonance of the speaker so that the effective frequency range can be increased and better SPL value and loudspeaker stability can be obtained in lower frequency range. Several loudspeakers are fabricated and their experimental SPL curves are used to verify the finite element model. Then based on the finite element model, the effects of aspect ratio of panel and the parameters such as voice coil diameter on the SPL curves of the loudspeakers are studied. The optimal panel aspect ratio and the diameter of voice coil for the loudspeakers are determined. It has been shown that the optimally designed loudspeaker can have smoother SPL curve and higher sensitivity.
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