Underground Systems and Resonance Chambers in Austria (voiceover)

Voiceover over a presentation about underground systems and Resonance-chambers in Austria.
Presentation originally held on 09.12.2022 in Austria (german versioin also available on this channel: "Erdställe im Mühlviertel").

Presentator & Voiceover:
Gunnar D. Hiptmair from Tagu-experience research team

Video and editing:
Roman Pollak & Gunnar D. Hiptmair

Music & Signation design:
Daniel Hackl