Microphone position device and method for testing noise in automobile

Abstract

The invention discloses a microphone position device and method for testing noise in an automobile. The device comprises a gradienter, a height control rod, a transverse position control rod, a fixedrod and a microphone, the bottom of the height control rod is rotationally connected with the fixed rod through a hinge; the top of the height control rod is connected with the transverse position control rod; the gradienter is arranged on the height control rod; the microphone is arranged on the transverse position control rod; the fixed rod is inserted into a gap between a seat cushion and a backrest; the height control rod is ensured to be located at the intersection line of the seat cushion and the backrest, the gradienter is adjusted to enable the bubbles of the gradienter to be located in the middle, the height control rod is ensured to be vertical, and the position corresponding to the transverse position control rod is a microphone test point; the device has the advantages that theoperation is simple, convenience and rapidness are realized, the microphone device point can be determined through four steps, and meanwhile, the precision is high.

Description

technical field [0001] The invention relates to the technical field of automotive noise testing, in particular to a microphone position device and method for automotive interior noise testing. Background technique [0002] In the field of GB / T 18697 Automotive Interior Noise Test, in order to check whether the noise of the car is within the specified limits, and whether there are obvious changes since the car was submitted or between different batches of submitted cars, it is necessary to test the passenger Noise value next to the ear. But there are the following problems in the specific test: [0003] (1) The vertical coordinate of the microphone is (70±5) cm above the intersection line between the surface of the seat and the backrest. When installing, use a tape measure to measure the height of 70cm, and the national standard requires that it is difficult to be accurate directly above the intersection line between the seat and the backrest; [0004] (2) The horizontal a...

AI Technical Summary

Problems solved by technology

When installing, use a tape measure to measure the height of 70cm, and the national standard requires that it is difficult to be accurate directly above the intersection line between the seat and the backrest;

[0004] (2) The horizontal abscissa of the microphone is the center of the seat facing right (20±2) cm. For headrests of different widths, it needs to be remeasured to meet the requirements, which is time-consuming and laborious

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