Structure-borne noise reduction in the compartment of a passenger car using power-based transfer path analysis

The module which is used for the operation of PDP TV consists of three main PCB board, X-board, Y-board, SMPS. Numerous studies on identifying noise sources of PDP TV, and reducing the noise have so far been done through experiments. However, it has been difficult to identify the exact noise sources due to correlations between sources as they are located close to each other. For that reason, Multi-Dimensional Spectral Analysis, MDSA, one of Transfer Path Analysis method, is increasingly required since it enables a quantitative analysis of each input signal’s contribution to the out signal to be carried out by eliminating the correlations of input signals. In this study, Transfer Path Analysis using MDSA is implemented to determine the quantitative noise contribution of each board. And the possibility of noise reduction is confirmed through the experimental method that isolates the most contributing board by adding sound-absorbing materials to it.

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Transfer path analysis of rumbling noise in a passenger car based on in-situ blocked force measurement

Applied Acoustics ◽

10.1016/j.apacoust.2019.01.015 ◽

2019 ◽

Vol 149 ◽

pp. 1-14 ◽

Cited By ~ 8

Author(s):

Taejin Shin ◽

Yeon Soo Kim ◽

Kanghyun An ◽

Sang Kwon Lee

Keyword(s):

Path Analysis ◽

Force Measurement ◽

Passenger Car ◽

Transfer Path ◽

Transfer Path Analysis

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131 Noise Reduction of Vacuum Cleaner with the Method of Transfer Path Analysis by Actual Measurement Data

The Proceedings of the Symposium on Environmental Engineering ◽

10.1299/jsmeenv.2009.19.109 ◽

2009 ◽

Vol 2009.19 (0) ◽

pp. 109-111

Author(s):

Kiyoshi YABATA ◽

Shigenori SATO ◽

Keiichi FUJIMORI ◽

Hideyuki HARADA

Keyword(s):

Path Analysis ◽

Noise Reduction ◽

Measurement Data ◽

Vacuum Cleaner ◽

Actual Measurement ◽

Transfer Path ◽

Transfer Path Analysis

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Application of Vibrational Power Flow to a Passenger Car for Reduction of Interior Noise

Shock and Vibration ◽

10.1155/2000/619326 ◽

2000 ◽

Vol 7 (5) ◽

pp. 277-285 ◽

Cited By ~ 12

Author(s):

S.K. Lee

Keyword(s):

Path Analysis ◽

Noise Level ◽

Decomposition Method ◽

Power Flow ◽

Vibration Isolation ◽

Passenger Car ◽

Isolation System ◽

Transfer Path ◽

Transfer Path Analysis ◽

Vibrational Power Flow

Reduction of structure-borne noise in the compartment of a car is an important task in automotive engineering. Transfer path analysis using the vibroacoustic reciprocity technique or multiple path decomposition method has generally been used for structure-borne noise path analysis. These methods are useful for solving a particular problem, but they do not quantify the effectiveness of vibration isolation of each isolator of a vehicle. To quantify the effectiveness of vibration isolation, vibrational power flow has been used for a simple isolation system or a laboratory-based isolation system. It is often difficult to apply the vibrational power flow technique to a complex isolation system like a car. In this paper, a simple equation is derived for calculation of the vibrational power flow of an isolation system with multiple isolators such as a car. It is successfully applied not only to quantifying the relative contributions of eighteen isolators, but also to reducing the structure-borne noise of a passenger car. According to the results, the main contributor of the eighteen isolators is the rear roll mount of an engine. The reduced structure-borne noise level is about 5dBA.

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