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Effect Analysis of Loudspeaker’s Placement Angle and Direction on Frequency Response and Sound Pressure Level in TV Applications

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
In a television, obtaining a good acoustic response is a challenging issue because of slim mechanical structures. The area dedicated for speaker’s placement is limited and inadequate space inside the cabinet of a TV prevents possible solutions to increase the sound performance. In addition, frame of the TV’s is getting narrower as the customers searching for the highest screen to body ratio. These designing aspects restrain optimal speaker positioning to achieve good sound performance. In this paper, an analysis related to speaker’s placement and mounting angle is proposed. A rotation setup compatible with a TV was prepared to measure different facing position of the speaker. This paper proposes the analysis of speaker’s rotation and facing direction in a flat panel television and its effects on sound pressure level together with deviation of the acoustic response. Measurement results are analyzed with an audio analyzer together with a statistics tool to achieve precise results.
Rocznik
Strony
79--85
Opis fizyczny
Bibliogr. 30 poz., rys., tab., wykr.
Twórcy
  • Arçelik AŞ., Electronics HW Design, Turkey
Bibliografia
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  • 3. Been K. H., Je Y. U. B., Lee H. S., Moon W. K. (2015), A parametric array PMUT loudspeaker with high efficiency and wide flat bandwidth, 2015 Transducers – 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), Anchorage, AK, pp. 2097-2100, doi: 10.1109/TRANSDUCERS.2015.7181371.
  • 4. Christensen S. T., Olhoff N. (1998), Shape optimization of a loudspeaker diaphragm with respect to sound directivity properties, Control and Cybernetics, 27 (2): 177-198.
  • 5. Cruz A., Martinez M. H. (2014), Frequency band displacement for optimizing acoustic boxes above the natural frequency of the loudspeaker, 2014 XIX Symposium on Image, Signal Processing and Artificial Vision, Colombia.
  • 6. Dobrucki A. (2006), Diffraction correction of frequency response for loudspeaker in rectangular baffle, Archives of Acoustics, 31 (4): 537-542.
  • 7. Gan W. S., Kuo S. M., Toh C. W. (2001), Virtual bass for home entertainment, multimedia PC, game station and portable audio systems, IEEE Transactions on Consumer Electronics, 47 (4): 787-796, doi: 10.1109/30.982790.
  • 8. Hwang G. Y., Kim H. G., Hwang S. M., Kang B. S. (2002), Analysis of harmonic distortion due to uneven magnetic field in a microspeaker used for mobile phones, IEEE Transactions on Magnetics, 38 (5): 2376-2378, doi: 10.1109/TMAG.2002.803579.
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  • 10. Jaskula M., Mickiewicz W. (2013), The effect of lowering the resonant frequency of the loudspeaker during impedance measurement as a function of the signal power, 18th International Conference on Methods & Models in Automation & Robotics (MMAR), Miedzyzdroje, Poland, 2013, pp. 701-704, doi: 10.1109/MMAR.2013.6669997.
  • 11. Kim W., Jang G. W., Kim Y. Y. (2010), Microspeaker diaphragm optimization for widening the operating frequency band and increasing sound pressure level, IEEE Transactions on Magnetics, 46 (1): 59-66, doi: 10.1109/TMAG.2009.2025271.
  • 12. Kitagawa S., Kajikawa Y. (2009), Dynamic distortion measurement for linearization of loudspeaker systems, 2008 International Symposium on Intelligent Signal Processing and Communications Systems, Bangkok, Thailand, 2009, pp. 1-4, doi: 10.1109/ISPACS.2009.4806674.
  • 13. Klippel W. (2005), Loudspeaker nonlinearities – causes, parameters, symptoms, 119th Audio Engineering Society (AES) Convention, USA.
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  • 15. Kwon J. H., Hwang S. M., Kim K. S. (2007), Development of slim rectangular microspeaker used for minimultimedia phones, IEEE Transactions on Magnetics, 43 (6): 2074-2706, doi: 10.1109/TMAG.2007.893784.
  • 16. Lee C. M., Hwang S. M. (2011), Optimization of SPL and THD performance of microspeakers considering coupling effects, IEEE Transactions on Magnetics, 47 (5): 934-937, doi: 10.1109/TMAG.2010.2089502.
  • 17. Lee C. H., Kwon J. H., Kim K. S., Park J. H., Hwang S. M. (2010), Design and analysis of microspeakers to improve sound characteristics in a low frequency range, IEEE Transactions on Magnetics, 46 (6): 2048-2051, doi: 10.1109/TMAG.2010.2042793.
  • 18. Medley P., Billson D. R., Hutchins D. A., Davis A. J. (2019), A new design of thin and flexible loudspeaker, University of Warwick, UK.
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  • 23. Pawar S. J., Weng S., Huang J. H. (2012), Total harmonic distortion improvement for elliptical miniature loudspeaker based on suspension stiffness nonlinearity, IEEE Transactions on Consumer Electronics, 58 (2): 221-227, doi: 10.1109/TCE.2012.6227416.
  • 24. Ravaud R., Lemarguand G., Lemarguand V. (2010), Ranking of the nonlinearities of electrodynamic loudspeakers, Archives of Acoustics, 35 (1): 49-66.
  • 25. Ravaud R., Lemarguand G., Roussel T. (2009), Time-varying non-linear modeling of electrodynamic loudspeakers, Applied Acoustics, 70 (3): 450-458, doi: 10.1016/j.apacoust.2008.05.009.
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  • 29. Takewa H., Saiki S., Kano S., Inaba A. (2006), Slim-type speaker for flat panel televisions, IEEE Transactions on Consumer Electronics, 52 (1): 189-195, doi: 10.1109/TCE.2006.1605046.
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Uwagi
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-c9e57c91-8f6f-4b27-8cde-ece94e02fcc6
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