Vehicle audio system

A method for a speakerless sound system comprising:

• providing a first audio signal having a first frequency range on a first channel of an audio amplifier, wherein the first channel is operatively coupled to a first acoustic exciter, and the first acoustic exciter is coupled to a first sound panel formed of a material having a first flexural modulus;
• providing a second audio signal having a second frequency range on a second channel of the audio amplifier, the second frequency range different than the first frequency range, wherein the second channel is operatively coupled a second acoustic exciter, and the second acoustic exciter is coupled to a second sound panel formed of a material having a second flexural modulus, the second flexural modulus different than the first flexural modulus;
• generating a first range of sound pressure vibrations by the first sound panel dependent on the first flexural modulus, a first set of dimensions of the first sound panel, and the first audio signal;
• and
• generating a second range of sound pressure vibrations by the second sound panel dependent on the second flexural modulus, a second set of dimensions of the second sound panel, and the second audio signal.