science, acoustics, accrual of the echo, copper engraving after Athanasius Kircher (1602 - 1680), wall, walls, sonic, reflection, 17th century, historic, historical, physics, echo, echoes, audio, tone, sound, sounds, acoustics, people, Additional-Rights-Clearences-Not Available

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Photo credit: © INTERFOTO / History / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 17th, accrual, acoustics, athanasius, audio, century, copper, echo, echoes, engraving, historic, historical, kircher, people, physics, reflection, science, sonic, sound, sounds, tone, wall, walls