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NVH Testing

NVH stands for Noise, Vibration, and Harshness, and NVH testing for automotive vehicles focuses on evaluating and mitigating undesirable noise, vibration, and harshness characteristics.

These tests help ensure a comfortable and quiet driving experience for passengers.

NVH testing aims to achieve a balance between comfort, performance, and safety, ensuring that vehicles provide a pleasant and enjoyable driving experience while meeting industry standards and customer expectations.


Here are the main types of NVH testing for automotive vehicles:

Noise Testing
  • Interior Noise: Measures the noise levels inside the vehicle cabin under various driving conditions. Different sources of noise, such as engine, road, wind, and HVAC systems, are assessed.
  • Exterior Noise: Evaluates the noise emitted by the vehicle to the external environment. It includes measurements of pass-by noise and stationary noise levels.


Vibration Testing
  • Whole-Body Vibration: Analyses the vibrations transmitted through the vehicle’s chassis to the occupants. These vibrations can originate from engine, road, suspension, and drivetrain components.
  • Hand-Arm Vibration: Focuses on vibrations transmitted to the driver and occupants through the steering wheel and controls.


Harshness Testing
  • Ride Harshness: Assesses the discomfort experienced by passengers due to road-induced vibrations and impacts. It involves evaluating how well the suspension system isolates the vehicle from road irregularities.
  • Engine Noise and Vibration Harshness (NVH): Evaluates the noise and vibrations generated by the engine, including assessing engine mounts, exhaust systems, and ancillary components.
Modal Analysis
  • Identifies the natural resonant frequencies and mode shapes of vehicle components and systems. This analysis helps engineers optimize designs to avoid resonance-related issues.


Sound Quality Analysis
  • Focuses on the perception of sound by occupants. It involves subjective assessments of sound characteristics, such as pitch, loudness, and tonal quality, to create a pleasing auditory experience.


Acoustic Material Testing
  • Evaluates the effectiveness of sound-absorbing and sound-blocking materials used in the vehicle’s construction. This testing helps engineers select and position materials to minimize unwanted noise.
Wind Noise Testing
  • Measures and analyses the noise generated by air turbulence and airflow around the vehicle, particularly at higher speeds. It helps optimize vehicle design to reduce wind noise.

Torsional Vibration Testing
  • Assesses the torsional vibrations in drivetrain components, such as the engine and transmission. This testing helps optimize component design and minimise drivetrain related NVH issues.

Durability Testing
  • Involves subjecting the vehicle to various road conditions and environmental factors to identify potential wear and degradation that could lead to increased NVH levels over time.

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