Preview Questions NVH Engineer | Role Specific Skill

Question 1: What is the purpose of a "sound quality index" in automotive NVH studies, and how is it calculated?

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A sound quality index combines multiple psychoacoustic parameters to provide a single metric that reflects the overall comfort of the vehicle's sound environment

It measures the fuel efficiency of the vehicle

It calculates the speed and performance of the vehicle

It is used to calculate the cost of vehicle production

Question 2: How do you assess the subjective sound quality of an automotive interior using psychoacoustic analysis?

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By focusing solely on low-frequency noise

By measuring only the total sound pressure level

By using only frequency spectrum analysis

By analyzing parameters such as loudness, sharpness, and roughness to quantify perceived sound quality

Question 3: How does the integration of acoustic laminates in automotive dashboards contribute to noise reduction?

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Absorbs and dampens vibrations and sound waves, reducing cabin noise

Enhances the structural rigidity of the dashboard

Simplifies the manufacturing process

Improves the thermal insulation of the dashboard

Question 4: Which analysis technique is used to separate vibration signals into their constituent frequencies and amplitudes?

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Phase Analysis

Wavelet Transform

Fast Fourier Transform (FFT)

Time-Domain Analysis

Question 5: In automotive sound quality analysis, what is the primary purpose of using a subjective listening test alongside objective measurements?

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To reduce the number of required sensors in testing

To correlate human perception with measured acoustic parameters

To validate the effectiveness of sound insulation materials

To comply with regulatory noise limits

Question 6: What is the most common method for analyzing vibration in automotive structures?

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Time-domain analysis

Signal averaging

Modal analysis

Thermal imaging