Zhiliang Zhang, Yong Shen*, Jie Xia, Yuchen Shen
Sound & Vibration, Vol.52, No.5, pp. 28-33, 2018, DOI:10.32604/sv.2018.03862
Abstract Since microspeakers are widely used in mobile phones, high power is usually applied to obtain sufficient output sound pressure. However, the electric power is almost converted into heat, leading to the thermal problem in microspeakers. Compared with large loudspeaker, microspeakers are smaller and the under yoke is relatively closed, causing the heat transfer more complex. In this study, a three-stage nonlinear thermal model was proposed for analyzing the thermal behavior in microspeakers. The inside air is a buffer area between the voice coil and magnet, and modeled as a middle stage of the heat transfer. The forced convection is still… More >
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