Automobile wind vibration noise sound quality objective annoyance degree evaluation index and calculation method thereof

Abstract

The invention provides an automobile wind vibration noise sound quality objective annoyance degree evaluation index and a calculation method thereof. The objective annoyance degree is equivalent to the subjective annoyance degree and can reflect the subjective feeling of people on the automobile wind vibration noise. The method comprises: firstly, establishing an automobile wind vibration noise model, conducting wind vibration noise simulation on the model, and obtaining wind vibration noise data at key positions under different working conditions; secondly, performing sound quality objectiveanalysis and subjective evaluation on the wind vibration noise data to obtain eight objective acoustic parameters and a subjective annoyance degree; then, using eight objective acoustic parameters asinput, using the subjective annoyance degree as output, and training a BP neural network; and finally, obtaining influence weight coefficients of the eight objective acoustic parameters by using the trained BP neural network so as to establish a wind vibration noise objective annoyance degree calculation model. After the objective annoyance degree calculation model is obtained, only eight objective acoustic parameters need to be used for calculation to obtain the objective annoyance degree, a large number of subjective evaluation tests are avoided, the development period is shortened, and thecost is reduced.

Description

technical field [0001] The invention relates to an objective annoyance evaluation index of the sound quality of automobile wind vibration noise and a calculation method thereof, in particular to an objective annoyance evaluation index of the sound quality of automobile wind vibration noise which can reflect subjective feelings and a calculation method thereof. Background technique [0002] Automobile wind noise is the aeroacoustic response of the air inside the car to the external transient airflow. It is a low-frequency and high-intensity aerodynamic noise formed when the car window is opened. Long-term exposure to wind noise will cause the driver and passengers to feel irritable and tired, which will seriously affect the ride comfort. [0003] In traditional wind-induced noise research, the sound pressure level is usually used as the only evaluation index. Such a single evaluation index cannot fully reflect the physical characteristics of sound, let alone the human ear's ...

AI Technical Summary

Problems solved by technology

However, in the process of automobile design and improvement, a large number of subjective sound quality evaluation tests are required to evaluate the design effect, which is time-consuming, labor-intensive, and costly; Feelings are different, leading to unstable subjective evaluation results

In addition, using the method of real vehicle test to obtain the noise signal inside the vehicle will not be able to eliminate the influence of environmental noise and mechanical noise, which will lead to the inability to evaluate and optimize the wind vibration noise

Images