The acoustical design of slim size piezoelectric speakers for mobile phones

Jun Kuroda, Yasuharu Onishi, Yukio Murara, Motoyoshi Komoda, Kazuyuki Tsunoda, Masatake Takahashi, Yasuhiro Oikawa, Yoshio Yamasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recently, market demand for slim mobile phones has been increasing. Speakers are an important device in mobile phones because they create an interface with the phone user. However, due to the thickness of conventional electrodynamic speakers, designers have been restricted in how they design the mobile phone case. Piezoelectric speakers could solve this problem, because they are no more than 1.0 mm thick. We therefore developed an ultra-thin piezoelectric speaker with a thickness of less than 0.9 mm. Piezoelectric speakers, however, differ from electrodynamic speakers in certain ways, requiring the formulation of guidelines for optimum design. In this study, we examined the relationship between design factors such as the acoustic structure, damping of phone case vibration, and electrical pass design and the acoustic characteristics in order to achieve high-quality sound in a slim mobile phone that uses our piezoelectric speaker. Copyright

Original languageEnglish
Title of host publication20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
Pages1170-1177
Number of pages8
Publication statusPublished - 2010 Dec 1
Event20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society - Sydney, NSW, Australia
Duration: 2010 Aug 232010 Aug 27

Publication series

Name20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
Volume2

Other

Other20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society
CountryAustralia
CitySydney, NSW
Period10/8/2310/8/27

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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  • Cite this

    Kuroda, J., Onishi, Y., Murara, Y., Komoda, M., Tsunoda, K., Takahashi, M., Oikawa, Y., & Yamasaki, Y. (2010). The acoustical design of slim size piezoelectric speakers for mobile phones. In 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society (pp. 1170-1177). (20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society; Vol. 2).