What does NVH mean?
3 Answers
Automotive NVH, where H specifically refers to Harshness. Automotive NVH decibels refer to Noise, Vibration, and Harshness, which is also the English abbreviation for Noise–Vibration–Harshness. This is a comprehensive measure of automotive manufacturing quality and provides the most direct and superficial experience for car users. Below is an introduction to NVH: 1. Characteristics: The study of NVH characteristics is not only applicable to the entire new car development process but also to research aimed at improving the ride comfort of existing models. It involves modeling and analyzing a specific system or assembly of a car to identify the factors that most affect ride comfort, then improving the vibration conditions of the excitation source (reducing amplitude or shifting frequency) or controlling the transmission of vibration and noise from the excitation source into the car cabin to enhance ride comfort. 2. Relationship: The generation of automotive vibration and noise is not independent but closely related. It can be said that noise originates from vibration, and these three factors—vibration, noise, and comfort—are closely interconnected. The goal is to reduce vibration and noise while improving ride comfort, ensuring product safety, environmental friendliness, and performance.
Oh, seeing 'NVH' reminds me of automotive noise reduction technologies! As someone who works with engines daily, I'm particularly focused on vehicle noise issues. NVH is actually a term in automotive engineering, standing for Noise, Vibration, and Harshness. Manufacturers reduce noise by installing sound insulation cotton, optimizing suspension bushings, and designing quiet tire tread patterns. For example, German cars often use felt materials in wheel arch liners. Recently, I test drove a new energy vehicle from a domestic brand and found they filled sheet metal cavities with liquid acoustic glue, reducing road noise by 4 decibels at 60km/h compared to models from three years ago.
Last week, I helped an old classmate choose a car, and he was particularly concerned about wind noise at high speeds. This reminded me of airflow optimization in NVH engineering, similar to how luxury cars install vortex generators at the base of side mirrors. Actually, interior rattling can also be an NVH issue—I once encountered a case where a buzzing sound in the B-pillar was caused by seatbelt buckle resonance. The current mainstream solution involves applying constrained layer damping sheets inside the dashboard, while premium cars even use dual-component acoustic foam. For improving your car's quietness, switching to a set of quiet tires delivers the most immediate results.
