Scott Smith, a principal engineer in Toyota’s vehicle performance department, has been hard at work making car interiors ...

the need for specialized NVH materials is increasing, as traditional internal combustion engine noise is absent in EVs, necessitating new materials to address road and wind noise more effectively.

These noises produce acoustical resonance in the interior of the passenger car and such resonant noise is called "road booming noise". Cancellation of this noise is the topic of this chapter.