Preview Questions NVH Engineer | Role Specific Skill

Question 1: What is the significance of sensor frequency response in NVH testing, and how is it calibrated?

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Sensor frequency response only applies to low-frequency noise

Sensor frequency response determines the sensor's ability to detect signals at various frequencies, and calibration ensures it accurately captures the signal

It is only used for measuring high-frequency noise

Frequency response is irrelevant as long as the sensor works

Question 2: How do you optimize the placement of sensors for NVH testing to ensure accurate data collection?

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By considering the geometry of the vehicle and the specific source of noise or vibration to capture relevant data

By using a fixed location for all sensors

By placing sensors randomly to cover more area

By focusing only on the engine compartment

Question 3: What is the primary challenge when conducting NVH testing on electric vehicles (EVs) compared to internal combustion engine (ICE) vehicles?

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Higher levels of exhaust noise

Lower overall noise levels making it harder to detect subtle NVH issues

More complex engine sounds

Increased thermal noise from the engine

Question 4: How is the "sharpness" of an automotive sound quantified, and why is it important in sound quality analysis?

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Sharpness is unrelated to the vehicle's performance

Sharpness quantifies the perception of high-frequency content and is used to assess discomfort or irritation caused by certain sounds

Sharpness quantifies the amount of vibration in the suspension

Sharpness measures only low-frequency noise

Question 5: How does the spectral content of a sound impact the subjective perception of automotive sound quality?

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The spectral content determines the texture and tonal balance of the sound, affecting how pleasant or harsh it feels to the listener

The spectral content is only important for measuring sound pressure levels

Spectral content is unrelated to sound quality

Spectral content only impacts the loudness of the sound

Question 6: How do you assess the subjective sound quality of an automotive interior using psychoacoustic analysis?

Which action should you take?

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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