As a natural consequence of modern society’s manufacturing process, transportation and communication activities, sound and vibration affect environment and all of us. They affect the safety of our vehicles, the construction of our buildings, and the level of noise at home and work. Our escalating demands for safety and physical well-being mirror our increased awareness of the effects of noise and vibration. Agreeable acoustics is a primary differentiator of a product from its competitors.

Our NVH team can provide the necessary support to quantify NVH by – reducing it at the source, isolating it from the car’s main structure and absorbing as much as possible before it enters the cabin with availability of an extensive range of specialist facilities and industry leading tools and techniques.

DEP’s full vehicle NVH capabilities includes:

Trimmed Body Analysis

  1. Glazed BIW, Trimmed BIW Model building
  2. Modal/FRF Analysis to identify modes
  3. Free Free Stiffness Analysis
  4. Static Stiffness Analysis
  5. Attachment Point Dynamic Stiffness Analysis
  6. Body Panel Point Mobility Analysis
  7. Virtual Transfer Analysis
  8. Noise Transfer Analysis


Full Vehicle Analysis

  1. Full Vehicle Model building
  2. Powertrain Modal Model building
  3. Full Vehicle Modal Analysis
  4. Powertrain AVL Excite MBD analysis (Idle/WOT) up to driveline for Vehicle NVH

Powertrain induced Noise

  1. Idle Shake/Boom
  2. Driveline Imbalance
  3. Powertrain Noise

Road Induced Noise

  1. Road Shake
  2. Road Noise

Tire Induced Noise

  1. Tire Wheel Imbalance
  2. Tire Force Variation

Root Cause/Remedation Analysis Methods

  1. Panel Contribution Analysis
  2. Grid Point Contribution Analysis
  3. Modal Contribution Analysis
  4. ERP (Equivalent Radiated Power) Analysis
  5. Optimisation (SOL200) analysis
  6. Operating Deflection Shape (SOL108) Analysis
  7. Transfer Path Analysis (TPA)

System Level Analysis

  1. Steering System
  2. Exhaust System (Hanger Location/Hanger Modal performance)
  3. Closures
  4. Seat
  5. Radiator
  6. Suspension Links
  7. Cradle
  8. HVAC
  9. Suspension
  10. Frame
  11. Road Wheel

High Frequency Analysis

  1. Transmission Loss Analysis for Mufflers, Windshields, Firewalls etc.

Morphing Techniques and parameterization