Preview Questions NVH Engineer | Role Specific Skill

Question 1: What is the main purpose of using correlation techniques in NVH data analysis?

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To calibrate measurement equipment

To filter out unwanted frequencies

To compare vibration data from different tests or locations and identify common sources

To enhance the signal-to-noise ratio

Question 2: In the calibration of a sound intensity meter for automotive applications, what role does the reference sound source play?

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It provides a standardized sound level for comparison and accuracy verification

It amplifies the sound signal for better measurement

It acts as a noise generator to test the system's limits

It absorbs unwanted noise during calibration

Question 3: How does the application of mass-loaded vinyl (MLV) contribute to noise reduction in automotive interiors?

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Enhances the thermal insulation properties

Increases the structural strength of panels

Absorbs and blocks sound waves, reducing noise transmission

Improves the aesthetic finish of interior surfaces

Question 4: How does a pass-by noise test differ from an in-vehicle noise measurement, and what does each test reveal?

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Pass-by noise tests are irrelevant for NVH analysis

Pass-by noise tests are done in a laboratory environment

In-vehicle tests measure only fuel efficiency, not noise

Pass-by noise tests measure the vehicle's exterior noise emissions at various speeds, while in-vehicle tests focus on cabin noise levels

Question 5: How do you use a shaker table in automotive vibration analysis, and what are its advantages?

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It only tests noise levels

It simulates real-world vibration conditions, allowing for precise control of input frequencies and amplitudes to test component durability

It is used solely to simulate road conditions

It is used to measure fuel efficiency

Question 6: In vibration analysis, what is the purpose of a fast Fourier transform (FFT)?

Which action should you take?

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To convert time-domain data into frequency-domain data for identifying vibration modes

To measure the total vibration energy of a system

To determine the damping ratio of a vibrating component

To isolate specific vibration frequencies in the system