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
    Volume2
    Publication statusPublished - 2010
    Event20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society - Sydney, NSW
    Duration: 2010 Aug 232010 Aug 27

    Other

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

    Fingerprint

    electrodynamics
    acoustics
    damping
    formulations
    vibration

    ASJC Scopus subject areas

    • Acoustics and Ultrasonics

    Cite this

    Kuroda, J., Onishi, Y., Murara, Y., Komoda, M., Tsunoda, K., Takahashi, M., ... 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 (Vol. 2, pp. 1170-1177)

    The acoustical design of slim size piezoelectric speakers for mobile phones. / Kuroda, Jun; Onishi, Yasuharu; Murara, Yukio; Komoda, Motoyoshi; Tsunoda, Kazuyuki; Takahashi, Masatake; Oikawa, Yasuhiro; Yamasaki, Yoshio.

    20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society. Vol. 2 2010. p. 1170-1177.

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

    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. vol. 2, pp. 1170-1177, 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society, Sydney, NSW, 10/8/23.
    Kuroda J, Onishi Y, Murara Y, Komoda M, Tsunoda K, Takahashi M et al. 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. Vol. 2. 2010. p. 1170-1177
    Kuroda, Jun ; Onishi, Yasuharu ; Murara, Yukio ; Komoda, Motoyoshi ; Tsunoda, Kazuyuki ; Takahashi, Masatake ; Oikawa, Yasuhiro ; Yamasaki, Yoshio. / The acoustical design of slim size piezoelectric speakers for mobile phones. 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society. Vol. 2 2010. pp. 1170-1177
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