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How to Evaluate MPV Floor Sound Insulation (NVH)? 2026 Three-Dimensional Analysis of Decibel Testing × Frequency Distribution × Road Surface Simulation with Real-World Comparison of Aviation Aluminium Floor vs Solid Wood vs Leather Sound Insulation

One-sentence answer: MPV floor sound insulation (NVH indicator) needs to be evaluated comprehensively from three dimensions: 'decibel testing × frequency distribution × road...