{"title":"Excitation Experiments of a Cone Loudspeaker and Vibration-Acoustic Analysis Using FEM","authors":"Y. Hu, X. Zhao, T. Yamaguchi, M. Sasajima, Y. Koike","volume":108,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":2160,"pagesEnd":2166,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10003536","abstract":"To focus on the vibration mode of a cone loudspeaker,
\r\nwhich acts as an electroacoustic transducer, excitation experiments
\r\nwere performed using two types of loudspeaker units: one employing
\r\nan impulse hammer and the other a sweep signal. The on-axis sound
\r\npressure frequency properties of the loudspeaker were evaluated, and
\r\nthe characteristic properties of the loudspeakers were successfully
\r\ndetermined in both excitation experiments. Moreover, under
\r\nconditions identical to the experiment conditions, a coupled analysis of
\r\nthe vibration-acoustics of the cone loudspeaker was performed using
\r\nan acoustic analysis software program that considers the impact of
\r\ndamping caused by air viscosity. The result of sound pressure
\r\nfrequency properties with the numerical analysis are the most closely
\r\nmatch that measured in the excitation experiments over a wide range
\r\nof frequency bands.","references":"[1] W. N. Brown Jr., \u201cTheory of conical sound radiators,\u201d J .Acoust. Soc.\r\nAm., vol. 13, no. 1, pp. 20\u201322, 1941.\r\n[2] P. G. Bordoni, \u201cThe conical sound source,\u201d J. Acoust. Soc. Am., vol. 28,\r\nno. 2, pp. 123\u2013126, 1945.\r\n[3] T. Nimura, E. Matsui, K. Shibayama, and K. Kido, \u201cStudy on the cone\r\ntype dynamic loudspeakers,\u201d J. Acoust. Soc. Jpn., vol. 7, no. 2, pp. 1628,\r\n1952.\r\n[4] F. J. Frankfort, \u201cVibration and Sound Radiation of Loudspeaker Cones,\u201d\r\nThesis, Delft, 1975 (Philips Res. Rep. Suppl., no. 2, 1975). [5] T. Ueno, K. Takahashi, K. Ichida, and S. Ishii, \u201cThe vibration analysis of\r\na cone loudspeaker by the finite element method,\u201d J. Acoust. Soc. Jpn.,\r\nvol. 34, no. 8, pp.470477, 1978.\r\n[6] K. Suzuki, and I. Nomoto, \u201cComputerized analysis and observation of the\r\nvibration modes of a loudspeaker cone,\u201d J. Audio Eng. Soc., 1982.\r\n[7] N. Kyouno, T. Usagawa, T. Yamabuchi, and Y. Kagawa, \u201cAcoustic\r\nresponse analysis of a cone-type loudspeaker by the finite element\r\nmethod,\u201d J. Acoust. Soc. Jpn., vol. 61, no. 6, pp. 312319, 2005.\r\n[8] A. Nagamatsu, Introduction to Modal Analysis, Corona Publishing Co.\r\nLtd., 1993\r\n[9] M. Sasajima, T. Yamaguchi, M. Watanabe, and Y. Koike, \u201cFEM analysis\r\nof a narrow acoustic sound pathway with rectangular cross section,\u201d\r\nSociety of Damping Technology, 2014(12).\r\n[10] T. Yamamoto, Speaker system, Radio Technology, Tokyo, 1996, pp. 144-\r\n145","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 108, 2015"}