JIANG, Yuan-Wu, Joong-Hak KWON, Hyung-Kyu KIM, and Sang-Moon HWANG. 2017. “Analysis and Optimization of Micro Speaker-Box Using a Passive Radiator in Portable Device”. Archives of Acoustics 42 (4): 753–760. https://doi.org/10.1515/aoa-2017-0078.