Test Method for Field Measurement of Sound Power Level by the Two-Surface Method

1997 ◽  
Author(s):  
Keyword(s):  
Field Measurement ◽  
Power Level ◽  
Test Method ◽  
Sound Power ◽  
Sound Power Level ◽  
Surface Method

A Study on Estimating Gasoline Engine Radiated Noise Based on Surface Vibration Measurement

2014 ◽  
Vol 694 ◽  
pp. 509-513 ◽  
Author(s):  
Guo Xu Cui ◽  
Can Song Gu ◽  
Hui Gao
Keyword(s):  
Gasoline Engine ◽  
Power Level ◽  
Test Method ◽  
Vibration Measurement ◽  
Vibration Velocity ◽  
Sound Power ◽  
Surface Vibration ◽  
Radiated Noise ◽  
Sound Power Level ◽  
Measuring Surface

A study on the method of estimating gasoline engine radiated noise by measuring surface vibration is carried out. Firstly, the theoretical basis and test method is studied. Then an experiment is carried out on a four-cylinder gasoline engine. By measuring the engine surface vibration velocity, the sound power level of these engine parts and of the engine body is calculated. The result shows that the estimation of engine radiated noise is accurate. It shows the sound power level of gasoline engine can be predicted by surface vibration.

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