Measurement of Acoustic Source Characteristic of Engine Intake System and Prediction of Engine Intake Mouth Noise

Abstract

Measurement of in-duct acoustic source parameters of the automotive intake system becomes much more important for the precise prediction of noise radiation. In this study, the direct method was employed to measure the source parameters of a 4-cylinder gasoline engine intake system at the condition of full wide open throttle operation. The measured parameters, such as source strength and source impedance, were applied to the precise intake noise prediction.