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Sound exciters are compact transducers that convert electrical signals into mechanical motion and then drive that motion into an attached surface, effectively turning walls, panels or furniture into loudspeakers. The explanation covers magnet gaps, voice coils, suspension and how surface mass and stiffness shape modal behaviour. Practical choices in mounting and electronics determine efficiency and tonal balance, suggesting there is more to learn about optimizing performance for specific materials and spaces. What a Sound Exciter Is and How It Differs From a Conventional Speaker What exactly transforms an ordinary panel into a loudspeaker? A sound exciter converts surfaces into radiating elements by coupling a compact transducer to glass, drywall or plastic, transferring vibrations directly instead of using a cone and cabinet. Unlike conventional speakers that depend on an enclosure to shape dispersion and bass, exciters rely on the surface’s material, size and rigidity to define frequ...