This is a short video, part of a longer documentary on our archaeoacoustic researches in Portugal together with the archaeologist Fernando Coimbra, which highlights the experiment about the archaeoacoustic effects of some reconstructed drums of Copper Age in the sacred sites of the same period of history. In this video you can listen the explanation by Fernando Coimbra how were built these drums tested in Alapraia 1 and Casal do Pardo sacred sites in Portugal. Interview and filming by Nina Earl. Video editi