A test method for the contribution of intake and exhaust port noise to vehicle interior noise

Abstract

The invention discloses a method for testing the contribution of intake and exhaust port noise to vehicle interior noise, which includes the following steps: step 1, a volumetric sound source is arranged at a measuring point of a test vehicle, and the measuring point is an air intake Or the exhaust port, arrange sound sensors at the measuring point and the response point in the vehicle, and measure the transfer function from the volumetric sound source to the measuring point and the transfer function from the volumetric sound source to the response point in the vehicle under static conditions; Step 2, Remove the volume sound source, run the test vehicle for dynamic working condition test, and obtain the noise spectrum of the sound sensor at the measurement point and the noise spectrum of the sound sensor at the response point in the vehicle by the data acquisition front end; step 3, calculate the measurement points of different orders The corresponding noise value of the noise transmitted to the response point in the vehicle is compared with the measured noise spectrum of the sound sensor at the response point in the vehicle to obtain the contribution of the noise of the intake and exhaust outlets to the noise in the vehicle. It can quickly test and calculate the contribution of intake and exhaust noise to interior noise.

Description

Technical field [0001] The present invention relates to a test of automotive noise contribution, and specifically, there is a test method of an intake air outlet noise on the noise contribution of the vehicle. Background technique [0002] At present, the industry's high-asterity of engine dynamics is constituted a pair of contradictions, from the perspective of the driver and occupant auditory comfort from the car, into the exhaust port radiation The degree of noise to the vehicle is removed from the sonoid size of its own, but also depends on the attenuation of each of the frequency bands of the exhaust port radiation noise. It is necessary to consider the sound source and acoustic transmission path to better reflect the contribution of the intake and exhaust port noise on the accent of the driver and the occupant. On the other hand, for high-end sports cars, the intake exhaust sound quality is more important, accurate and rapidly testing the income and exhaust port noise to co...

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic test methods for the contribution of intake and exhaust noise to the interior of the car are still limited to the traditional sound source separation method, which has low efficiency and reliability of the results, and the transfer path method is mainly used for the contribution of structural sound to the interior of the car. degree, has not been well applied to the noise of the intake and exhaust ports

Images