Multi-track sound mixing method for pedestrian warning sound of an electric vehicle

Abstract

The invention discloses a multi-track sound mixing method for pedestrian warning sound of an electric vehicle. Sound mixing operation is performed on the sub-sound samples respectively arranged on a plurality of sound tracks; the method comprises the steps that a sound mixing signal is generated according to the specified matching coefficient of each audio track and a specified vehicle state matching coupling coefficient, wherein the sound mixing signal comprises the functions of all sub-sound sample signals at the same time, and sub-sound samples meet all requirements in GB / T 37153-2018. According to the multi-track sound mixing method provided by the invention, the pedestrian warning sound of the electric vehicle is realized through single-track sound design, vehicle state matching and multi-track sound mixing adjustment, the law and regulation requirements are met, the sound showing brand genes can be well fused, and the designed warning sound can be well matched with the vehicle state.

Description

technical field [0001] The invention relates to the field of warning sound signal processing, in particular to a multi-track sound mixing method for pedestrian warning sounds of electric vehicles. Background technique [0002] In terms of research on warning sounds for pedestrians outside the car, meeting the low-speed driving sound of electric vehicles is the most basic requirement. [0003] In 2007, NFB began to lobby the US Congress to establish relevant regulations to solve the safety hazards caused by low-speed driving of electric vehicles. The American Society of Automotive Engineers established the "Vehicle Pedestrian Warning Sound Committee" to draft a pedestrian warning sound system evaluation method. [0004] In 2012, Auweraer Herman of LMS Company in Belgium believed that the definition and spectrum composition of pedestrian warning sounds for electric vehicles are the two most critical aspects. While producing sufficient warning effects on pedestrians, it is nec...

AI Technical Summary

Problems solved by technology

[0009] Pedestrian warning sound system has become the standard configuration of pure electric vehicles and plug-in hybrid vehicles. The sound quality of pedestrian warning sounds has become an important development index for electric vehicles. Pleasant pedestrian warning sounds can give cars extra points. Similarly, unpleasant pedestrian warning sounds will make consumers feel disgusted. However, due to the restrictions of national regulations, the design of pedestrian warning sounds has very large limitations. It is difficult to design a sound that not only meets the requirements of regulations but also highlights the brand gene. bigger

Images