Acoustic roughness analysis of a diesel engine noise. (2017)

• Record Type: Journal Article
• Authors: Mao, Jie; Zhu, L.; Wang, Xu; Peng, H.
• Is Part Of: International journal of vehicle noise and vibration. Volume 13:Number 3/4(2017)
• Page Start: 282
• Page End: 294
• Publication Date: 2017
• Subjects: internal combustion engine -- sound quality -- modified Aures roughness algorithm -- MARA -- roughness -- simulation -- optimisation; Automobiles -- Noise -- Periodicals; Automobiles -- Vibration -- Periodicals; 629.231
• Languages: English
• ISSNs: 1479-1471

Abstract

A modified Aures roughness algorithm (MARA) is proposed, which considers sound transfer functions of the concha, middle ear, and inner ear to improve the algorithm integrity and human auditory perception. A MARA-based method is implemented to simulate, optimise, and evaluate the acoustic roughness of a diesel engine noise. The finite-element engine components are validated by modal frequency test. Then, the normal vibration velocities and structural radiated noise of the block surface are obtained by flexible multi-body dynamic theory and boundary element method. The sound power levels and roughness of the radiated noise are calculated. Finally, the structure-borne noise is optimised to reduce roughness, which has validated the modified Aures roughness algorithm.