Schallreflexion in einem ovalen Sprachrohr

The engraving shows a cross-section of an oval-shaped device with narrow openings at either end, labeled with alphabetical markers. Straight lines trace the paths of sound waves originating from one focal point and reflecting off the interior walls to converge at the opposite focal point. This geometric study demonstrates how sound can be concentrated and directed using specific mathematical shapes.

Athanasius Kircher's work in acoustics was part of his broader 'natural magic,' which used scientific principles to understand and manipulate the hidden forces of nature. This diagram relates to the idea of universal harmony and the mechanical 'magic' of the Baroque era, where science was used to create wonder and uncover the mathematical structure of the created world.