A test method for car wind noise cavity sound

Abstract

The invention discloses a wind noise and cavity noise testing method for a vehicle. According to the wind noise and cavity noise testing method for the vehicle, adhesive tapes are pasted on the insideand outside of the vehicle; under a specific testing condition, firstly, a sound pressure level SPL1 and an articulation index AI1 at the right ear of a driver are tested; then seals outside the vehicle are removed, and a sound pressure level SPL2 and an articulation index AI2 at the right ear of the driver under the specific working condition are tested; and the SPL2 and the AI2, and the SPL1 and the AI1 are subjected to subtraction so as to obtain delta SPL1 and the delta AI1 which can be used for evaluating the wind noise and cavity noise level of the vehicle. The wind noises and the cavity noises can be accurately tested; and an engineer can evaluate the level of the cavity noises generated between a vehicle door and a vehicle body to lock wind noise weakness quickly and perform complete vehicle wind noise level optimization in a targeted mode, so that a wind noise improvement scheme is prevented from being searched for blindly, the research and development cost is reduced, and the wind noise development efficiency is improved.

Description

technical field [0001] The invention belongs to the automobile noise control technology, in particular to the research on the automobile noise control. Background technique [0002] With the development of the automobile industry, consumers have higher and higher requirements for automobile performance, especially the performance of automobile handling, noise, fuel consumption, and odor. As a key performance that consumers pay attention to, automobile noise has attracted the attention of major OEMs in recent years. Vehicle noise covers all aspects, such as wind noise generated by high-speed driving, engine noise generated by accelerated driving, tire noise generated by low-speed driving, etc. Among them, wind noise caused by high-speed driving is the focus of vehicle noise development and control. Good car wind noise performance can create a quiet driving environment and effectively reduce the fatigue of long-distance drivers. At the same time, it can also ensure clear dial...

AI Technical Summary

Problems solved by technology

Few engineers in the industry realize the subtle difference between wind noise leakage noise and wind noise cavity noise. In fact, the leakage noise value can only reflect the sealing performance of the sealing strip, but not the cavity between the door and the body. cavity noise

If the noise data measured by the current method is poor, the engineer cannot know whether it is the cavity noise or the leakage noise, or the aerodynamic noise is not well controlled. Of course, it is impossible to accurately diagnose the problem and formulate a reasonable optimization plan.

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