Reduced noise in the interior cavity is one of the prime selling points for automobiles. In order to consider the noise and vibration phenomena in the early stages of the design of an automobile, it is essential to create an analytical model capable of accurately expressing the dominant paths for transmission of acoustic and vibratory power, which comes to the cabin from a variety of sources. A method for creating a Hybrid SEA (Statistical Energy Analysis) model has been proposed. The model is capable of predicting structurally-propagated road noise in the 200 - 5000 Hz frequency range with an accuracy of 3 dB, and reproduces power flows among subsystems. Use of the Hybrid SEA model constructed under this method enabled structural noise propagations to be distinguished from air-borne propagations. Also obtained was the contribution of noise passing through acoustic systems as well as the contribution of acoustically radiated noise to the interior cavity. Therefore, the model is expected to enable designers to suggest specifications to be used in the process of designing against road and other noise.
Hybrid SEA Modeling Scheme for Analysis of High-frequency Noise in Passenger Car
Hybrid SEA (Statistical Energy Analysis) Modellschema zur Analyse von Hochfrequenz-Geräuschen in Personenkraftwagen
Review of Automotive Engineering (JSAE) ; 26 , 1 ; 3-8
2005
6 Seiten, 17 Bilder, 6 Quellen
Aufsatz (Zeitschrift)
Englisch
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