Pengukuran Sound Pressure Level (SPL) dalam kabin mobil dengan menggunakan SEA Model

Al Munawir, Murhaban Murhaban, Zulfan Zulfan

Abstract


Statistical energy analysis (SEA) is a well-known method to analyze the flow of acoustic and vibration energy in a complex structure. For an acoustic space where significant absorptive materials are present, direct field component from the sound source dominates the total sound field rather than a reverberant field, where the latter becomes the basis in constructing the conventional SEA model. Such environment can be found in a car interior and thus a corrected SEA model is proposed here to counter this situation. The model is developed by eliminating the direct field component from the total sound field and only the power after the first reflection is considered. A test car cabin was divided into two subsystems and by using a loudspeaker as a sound source, the power injection method in SEA was employed to obtain the corrected coupling loss factor and the damping loss factor from the corrected SEA model. These parameters were then used to predict the sound pressure level in the interior cabin using the injected input power from the engine. The results show satisfactory agreement with the directly measured SPL.

Keywords : Statictical Energy Analysis (SEA), Sound Pressure level (SPL), DLF and CLF


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References


K. Genuit, “The sound quality of vehicle interior noise: a challenge for NVH engineers,” International Journal Vehicle Noise and Vibration, vol. 1, no. 1-2, pp. 158–168, 2004.

G. DeJong, “A study of vehicle interior noise using SEA,” SAE Technical, 1995.

J. A. Steel, “The prediction of structural vibration transmission through a motor vehicle using statistical energy analysis,” Journal of Sound and Vibration, vol. 193, no. 3, pp. 691–703, 1996.

J. Marzbanrad and M. Alahyari, “Vehicle cabin noise simulation due to high frequency stimulation,” International Journal of Automotive Engineering, vol. 2, pp. 117–123, 2012.

J. Forsse´n, S. Tober, A. C. Corakci, A. Frid, and W. Kropp, “Modelling the interior sound field of a railway vehicle using statistical energy analysis,” Applied Acoustics, vol. 73, no. 4, pp. 301–311, 2012.

M. J. Kim, H. S. Kim, and J. Y. Sohn, “Prediction and evaluation of impact sound transmission in apartment building structures by statistical energy analysis (SEA),” Applied Acoustics, vol. 62, no. 6, pp. 601–616, 2011.

K. Delaere, “Statistical energy analysis of acoustic noise and vibration for electric motors: transmission from air gap field to motor frame,” Journal of the Acoustical Society of America, pp. 177–231, 2013.

K. Renji, P. S. Nair, and S. Narayanan, “Non-resonant response using statistical energy analysis,” Journal of Sound and Vibra- tion, vol. 241, no. 2, pp. 253–270, 2011.

Ribeiro and Smith, “Use of SEA to model the sound filed in large acoustic spaces,” in Forum Acousticum, pp. 79–84, 2015.

Al Munawir, Herri Darsan dan Murhaban, “Pengaruh dari direct field component pada ruang akustik dengan menggunakan SEA model” Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi, Vol. 5, No. 2, 2019




DOI: https://doi.org/10.35308/jmkn.v6i2.2758

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