In the context of automotive noise and vibration design, the issue of road-induced noise arising from electrification has emerged as a significant concern. The noise is generated when tire vibrations, excited by the road surface, are transmitted through a frame structure to panels. Large vibrations in the frame structure are caused by waves traveling through the frame structure, reflecting and transmitting at discontinuities, such as T-junctions, and eventually resonating. It is acknowledged that effective methods of reducing resonance include controlling wave reflection/transmission at discontinuities. In particular, it may be advantageous to utilize the structural damping of a frame structure to adequately dissipate the propagating energy of the traveling waves. In order to utilize this principle, it is essential to extend the propagation distance before the formation of standing waves. The present study proposes a methodology that aims to reduce resonance by suppressing wave propagation in a specific direction to extend the propagation distance and inducing wave attenuation. To achieve directional control, neutralizers were utilized, which can fully reflect waves at a designated frequency. The validity of the proposed methodology was demonstrated through its implementation on a finite element model simulating the frame structure of an automobile. This numerical validation demonstrated the method’s capacity to reduce resonance within a specified frequency band.