A Straightforward Approach for Cost-Effective Mitigation of Vehicle Interior Sound Leakage Noise and Structural Resonances

A novel and cost-effective methodology for vehicle NVH (Noise, Vibration, and Harshness) optimization is proposed to efficiently detect and mitigate interior noise sources. This approach eliminates the need for visual scanning and other time-consuming conventional methods typically used in the sound leakage detection process. The technique is structured in three key stages. First, the leakage detection and mapping stage employs a single P-U (Pressure-Particle Velocity) probe to perform detailed sound intensity measurements, generating high-resolution acoustic color maps that accurately localize leakage paths and structural transmission zones across the vehicle body. In the second stage, acoustic treatment, sound-absorbing materials are strategically applied to the identified critical regions, ensuring optimal resource utilization in terms of cost, weight, and acoustic performance. Finally, the performance evaluation stage quantifies the effectiveness of the applied treatments by comparing key acoustic indicators particularly the Sound Pressure Level (SPL)-before and after the intervention. Experimental results demonstrate that the proposed method achieved a ۳ dB reduction in SPL for front passengers and an average ۱ dB reduction for rear passengers, confirming its effectiveness in improving overall cabin acoustic comfort. This streamlined methodology provides a practical, repeatable, and efficient alternative to complex conventional NVH diagnostic procedures, facilitating faster and more cost-effective vehicle development and refinement.

کلیدواژه ها:

sound intensity ، acoustic leakage detection ، interior noise ، NVH optimization