In recent years, loudspeaker manufacturers have proposed to the market vibrating sound transducers (also called shakers or exciters) that can be installed on a surface or a panel to be transformed in invisible speakers capable of delivering sound. These systems show different frequency behaviors mainly depending on the type and size of the surface. Therefore, an audio equalization is crucial to enhance the sound reproduction performance achieving flat frequency responses. In this paper a multi-point equalization procedure is applied to several surfaces equipped with vibrating transducers, showing its positive effect from objective and subjective point of view.
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