A trained vocalist was sent through the caves testing different sounds and pitches in various locations. Spots of maximum resonance, or places where the voice was most amplified and clear, were noted in each section and later laid over a map of the cave drawings.
The vast majority of the paintings, up to 90 percent in some cases, were located directly at, or very near, the spots where the acoustics were the absolute best, they found.
The work is by Iegor Reznikoff, no publication yet.
