Simulating Odd Fire V-10 Exhaust Noise for Sound Quality Evaluation

Hetherington, Patricia L.; Hill, W. E.; Pan, Fumin; Snider, Benny J.; Bradamante, E.; Cerrato-Jay, G.

doi:10.4271/1999-01-1652

Cited by 8 publications

(1 citation statement)

References 2 publications

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“…Some of these types of software used by researchers are AVL-BOOST, WAVE, GT-Power and LAMPS and are based on the one-dimensional plane wave and the quasi-three dimensional theory for the prediction of exhaust noise. [4][5][6][7][8] However, from a sound perception viewpoint, researchers have studied the sound quality metrics for some of these predicted values of the exhaust noise and also the measured values of the exhaust noise. It is seen from the literature that there is scope to alter the muffler dimensions to achieve the optimum sound quality based on a jury evaluation.…”

Section: Introductionmentioning

confidence: 99%

A new sound quality metric for the design of engine exhaust mufflers

Reddy

Fatima

Mohanty

2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this paper, a study is made to determine the critical dimensions in the design of a family of reactive mufflers which significantly affect the sound quality of the tailpipe radiated noise. The sound quality parameters of the tailpipe noise such as the loudness level, the roughness and the tonality are measured, and a new sound quality metric is developed which can be used as an index to predict the performance of a muffler. The new sound quality metric was based on the evaluations of the synthesized tailpipe noise by a jury consisting of a few undergraduate and postgraduate students at the Indian Institute of Technology Kharagpur. Using the new sound quality metric, the parameters with the most influence on the design of the muffler can be determined. It was found that the length and the open area ratio of a concentric-tube resonator muffler have the highest impact on the tailpipe noise sound quality.

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Section: Introductionmentioning

confidence: 99%

A new sound quality metric for the design of engine exhaust mufflers

Reddy

Fatima

Mohanty

2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Effect of unequal Y-pipes on sound propagation in the exhaust system of V-engines

Selamet

Kothamasu

Jones

et al. 2004

Journal of Sound and Vibration

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Study on sporty exhaust sound of economical vehicle under acceleration

Yang,

Jia,

Liao

et al. 2024

Journal of Low Frequency Noise, Vibration and Active Control

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Exhaust sound quality is an important part of vehicle performance. In this paper, the sporty exhaust sound quality of an economical vehicle equipped with a 4-cylinder and 4-stroke engine is evaluated, analyzed, and improved under acceleration. Firstly, a sporty feeling evaluation method with engine speed divided is proposed, and the influence of exhaust sound order components on sporty exhaust sound is analyzed. The results show that while the A-weighted sound pressure level (ASPL) of Order 2 is lower and the ASPLs of Orders 4 and 6 are higher, the exhaust sound is sportier. Then, a hybrid predicted model of vehicle sporty exhaust sound under acceleration is established based on convolutional neural network (CNN) and support vector regression (SVR) algorithm. The relative errors between the predicted results of CNN-SVR hybrid model and the subjective evaluation results are limited within 2%, which indicates that the CNN-SVR hybrid prediction model achieves a high accuracy in assessing the sporty feeling of exhaust sound. Finally, considering the frequency ranges corresponding with the above order components under the practical accelerating condition, a strategy is proposed to enhance the sporty feeling of exhaust sound by reducing the sound energy within 100 Hz and increasing the sound energy within 100–450 Hz. Based on this strategy, a muffler with different structure is selected and installed on the economical vehicle, and the sporty feeling of exhaust sound is 0.63 points higher than before.

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Simulating Odd Fire V-10 Exhaust Noise for Sound Quality Evaluation

Cited by 8 publications

References 2 publications

A new sound quality metric for the design of engine exhaust mufflers

A new sound quality metric for the design of engine exhaust mufflers

Effect of unequal Y-pipes on sound propagation in the exhaust system of V-engines

Study on sporty exhaust sound of economical vehicle under acceleration

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