Analysis of a dynamic speaker in mobile phones by considering mechanical, electrical, and magnetic coupling effects
Gi-Hyun Hwang, K. T. Kim, Shi-Uk Chung, Sang-Moon Hwang, Beom-Soo Kang, Inho Hwang · Journal of Applied Physics · 2002
With the advent of 3G mobile phones, a combined laptop personal computer and mobile phone can be realized that enables multimedia data communication such as TV streaming, web searching, music play, etc. A dynamic speaker is an essential part to generate high quality sound in the next generation mobile phones. Noting that characteristics of a dynamic speaker are a coupled phenomenon of mechanical, electrical, and magnetic system, a systematic analysis must be implemented to fully consider the coupling effects for an improved design. This paper presents a complete analysis of a dynamic speaker by considering mechanical, electrical and magnetic coupling effects. Results of the analysis are confirmed by the experiments. An improved design of a dynamic speaker is also proposed with enhanced performance.