Case Study: General Motors improves EV acoustic comfort and speech intelligibility with Hexagon Actran

General Motors - Customer Case Study

General Motors faced new Noise, Vibration, and Harshness (NVH) challenges in the design of its electric vehicles, specifically with predicting mid-frequency issues to ensure passenger comfort. To address this, GM partnered with vendor Hexagon and leveraged their Actran software technology to improve its simulation capabilities and meet higher customer expectations for quieter EVs.

Hexagon's solution involved using Actran to create high-fidelity acoustic models for transfer path analysis, which allowed GM to accurately simulate how noise from sources like the Ultium Drive propagated to the cabin. This enabled engineers to identify problematic structural modes and optimize designs, such as increasing seat perforation for better sound absorption, resulting in significant acoustic performance improvements with minimal added mass. The partnership provided GM with the advanced tools and support needed to confidently develop solutions that delight customers.

General Motors

Dave Hamilton

Manager