The Development of Software for Automobile Sound Modulation and Application

Based on the technology of the order tracking and extraction, a software for the modulation of sound quality of automotive order sound is developed in this paper. The order analysis, the amplitude modulation of order sound in specific speed range and the calculation of the functional expression of the order sound amplitude are integrated in this software. Furthermore, a side-valve interpolation correction algorithm (SV-ICA) is proposed to solve the problem that the smooth transition of the order sound curve at endpoints cannot be guaranteed, which would result in the appearance of abnormal noise in the modulated sounds. The application of built software in constructing the automobile sounds with the sound quality of sportiness is demonstrated. And the results of sound modulation show that the modulation of order sound in any speed range can be flexibly realized by this software, and the smooth fluctuation of the order curve modulated can be effectively ensured by the application of the SV-ICA in any speed range, which has important engineering significance for automobile sound design.