Sample-based engine noise synthesis using a harmonic synchronous overlap-and-add method

Jan Jagla (1) , Julien Maillard (1) , Nadine Martin (2)

1 CSTB - Centre Scientifique et Technique du Bâtiment
2 GIPSA-SAIGA - GIPSA - Signal et Automatique pour la surveillance, le diagnostic et la biomécanique

In order to synthesize the noise of internal combustion engines at ar- bitrary speed variations, an overlap-add-based method is proposed to be applied to sound samples extracted from a prerecorded en- gine noise at a continuously-varying speed. The objective of this new method is to minimize the phase discontinuities between a fi- nite number of harmonics of the sample sounds likely to be con- catenated. The harmonicity of the synthesized signal is then pre- served which greatly enhances the acoustic quality of the restitution. Moreover, the synthesis stage is well suited for real time applications due to a low computational load compared to existing approaches. The proposed analysis-synthesis method can be applied to any har- monic sound whose spectral content depends solely on its funda- mental frequency. By analogy to existing overlap-and-add methods, the method introduced here is referred to as Harmonic Synchronous Overlap and Add (HSOLA).

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Jan Jagla, Julien Maillard, Nadine Martin. Sample-based engine noise synthesis using a harmonic synchronous overlap-and-add method. ICASSP 2012 - IEEE International Conference on Acoustics, Speech and Signal Processing, Mar 2012, Kyoto, Japan. ⟨hal-00661228v2⟩