NVH (Noise, Vibration, Harshness) Testing

Noise, vibration and harshness (NVH) can be used to study and measure the auditory and tactile feedback of objects. NVH analysis helps determine where the sound is coming from and what causes it. NVH is currently a key performance indicator in the automotive industry. Automotive NVH performance has an important impact on customer intuitive experience and brand image building, so it is crucial to solve NVH problems early in the design stage.

NVH testing is used to evaluate the vibrations experienced by the entire vehicle, parts or components at different frequencies. It is a means of identifying and separating various vibration sounds. The purpose of NVH testing is to identify the source and cause of noise in order to optimize vehicle design and process, reduce noise or vibration inside and outside the vehicle, and improve customer sensory comfort.

STEMart provides comprehensive NVH testing services to ensure that the NVH performance of the vehicle complies with relevant industry standards and regulations, improving vehicle comfort and customer satisfaction.

Test Samples

Motor, powertrain, seats, instrument panel, center console, car body, front and rear doors, steering column, air conditioning system, sunroof, sunshade, tailgate and small components, etc.

Test Items

• Vibration and stress testing
  • Vibration test (acceleration, velocity, displacement)
  • Shock response test (shock response spectrum)
  • Vibration sensitivity assessment (transfer function)
  • Rotating machinery vibration test (torsional vibration, order tracking)
  • Stress and strain test
  • Road map collection
• Acoustic testing
  • Sound pressure test
  • Sound power test
  • Sound intensity test
  • Sound insulation test
  • Sound absorption test
• Modal testing
  • Experimental modal testing based on hammering method and shaker
  • Operational deformation analysis
  • Shaker-based operating mode test
• Abnormal sound and sound quality testing
  • Subjective and objective test of abnormal sound
  • Abnormal noise source location test
  • Subjective and objective test of sound quality

For more information about our NVH testing services, please contact us.