Exterior Engine Noise Prediction Utilizing an Acoustic Tube by the Volume Velocity Measurement Method 2003-01-1444
An acoustic tube was developed and applied to measure the engine radiation noise for the prediction of the steady state exterior engine noise. Using accelerometers to measure the engine surface vibration is a difficult task, especially for the places like the exhaust manifold. The proposed method, an acoustic tube containing a microphone is set at a given distance from the engine and measurements were carried out in such a way that the whole engine surface was covered. Exterior engine noise at a certain distance from the vehicle was predicted by using the measured volume velocity values and propagation characteristics. The predicted results agreed well with previously experimented values.
Citation: Nakamura, M. and Nakano, M., "Exterior Engine Noise Prediction Utilizing an Acoustic Tube by the Volume Velocity Measurement Method," SAE Technical Paper 2003-01-1444, 2003, https://doi.org/10.4271/2003-01-1444. Download Citation
Author(s):
Masahiro Nakamura, Mitsuo Nakano
Affiliated:
Isuzu Advanced Engineering Center, Ltd., Tokyo University of Technology
Pages: 9
Event:
SAE 2003 Noise & Vibration Conference and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Exhaust manifolds
Acoustics
Vibration
Noise
Radiation
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