An optimal design of the internal space in a micro-speaker module

作者：Kim Dong Cheol; Jeong Hyun Yong^*

来源：International Journal of Precision Engineering and Manufacturing, 2015, 16(6): 1141-1147.

DOI：10.1007/s12541-015-0148-4

• Experimental design method
• Finite element analysis
• Micro speaker
• Resonant space
• Sound experiment

The development of display and battery technologies has led to the miniaturization of smart devices. However, the acoustic performance of micro speakers using less than 1-2 cm(3) of space has been limited. Internal space management for modules with limited internal volumes is a critical factor in the acoustic performance of mobile devices. Previous studies have mostly focused on improving the performance of a micro speaker itself. This study has sought to identify the characteristics of resonant space by performing an anechoic chamber experiment using the Taguchi method and by using the finite element analysis of a micro-speaker module. As a result, an optimum internal space was designed based on the effects of the structural characteristics of the interior of the microspeaker module on the acoustic performance. In particular, focus was placed on the rise in sound pressure at low frequencies and on the flatness of the sound pressure at high frequencies related to the size and shape of the internal space.

• 出版日期2015-6