Question

In his architectural treatise, Vitruvius described the placement of bronze resonance vases (echeia) beneath theater seating to amplify and clarify vocal harmonics. While Renaissance commentators frequently dismissed these descriptions as theoretical abstractions never realized in practice, twentieth-century archaeological surveys revealed hundreds of medieval church vaults across the Mediterranean fitted with embedded ceramic jars. Acoustic modeling of these structures indicates that rather than functioning as amplifiers—which ceramic vessels embedded in mortar are physically incapable of achieving—the jars acted as resonators that selectively absorbed low-frequency reverberations. In high-domed stone basilicas where prolonged reverberation times routinely muddied liturgical chanting, this selective absorption sharpened the acoustic intelligibility of the human voice. Because the resonant frequencies of ceramic vessels vary with their internal volume and neck aperture, medieval masons who standardized the dimensions of these embedded jars were effectively tuning the interior soundscapes of their sanctuaries to suppress modal resonances that coincided with liturgical recitation pitches.

Based on the passage, which of the following can most reasonably be inferred regarding the medieval use of embedded ceramic jars in church architecture?