Abstract
Recently, miniaturization has become a hot topic in microspeaker research and has attracted considerable attention. However, the acoustic quality of microspeakers-evaluated in terms of the sound pressure level (SPL)–declines if their dimensions are reduced. This study discusses the application of zeolite in the microspeaker box without causing a change in speaker dimensions. The equivalent circuit method and Langmuir adsorption isotherm have been used to analyze SPL of the microspeaker box. Based on the analysis results obtained in this study, microspeaker samples have been manufactured and their effectiveness has been experimentally verified. Simulation and experimental results reveal that the zeolite can improve SPL by approximately 3.5 dB over a frequency range of 100–1000 Hz.
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Recommended by Guest Editor Maenghyo Cho.
Yuan-Wu Jiang (M’ 92) received the M.S. degree in Lab. of Vibration & Acoustic Design of Electro-Mechanical System from Pusan National University, Korea, in 2016. He is currently studying for his Ph.D. degree in the same lab. His research interest includes design, analysis and optimization of electroacoustic products, such as microspeaker and balanced armature speaker.
Hwang Sang-Moon received the B.S. degree in Mechanical Engineering and the Ph.D. from the University of California at Berkeley, USA, in 1990 and 1994, respectively. He is currently a Professor in Mechanical Engineering with Pusan National University, Korea. He was also a CTO of Em-Tech, a Korean microspeaker company. His primary research interest includes magnetic in microspeakers.
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Jiang, YW., Xu, DP., Kwon, JH. et al. Analysis and application of zeolite in microspeaker box. J Mech Sci Technol 33, 3679–3683 (2019). https://doi.org/10.1007/s12206-019-0709-z
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DOI: https://doi.org/10.1007/s12206-019-0709-z