An optimal design of a micro speaker module using finite element simulations and tests

Since smart phones and headsets are quite popular nowadays, much research has been conducted to improve the sound quality of these devices. However, the previous research has been focused mainly on the speaker, not on the speaker module even though good sound quality of a speaker does not guarantee good sound quality of the speaker module. Thus, in this study an L-shaped module was proposed with four design parameters, and finite element simulations and tests were conducted to determine optimal values of the four design parameters for good sound quality of the speaker module. In addition, a regression function for the first resonance frequency and the first anti-resonance frequency was obtained as a function of the design parameters.