Fiber optic sensors for precursory acoustic signals detection in rockfall eventsL. Schenato, L. Palmieri, G. Gruca, D. Iannuzzi, G. Marcato, A. Pasuto and A. GaltarossaJ. Eur. Opt. Soc.-Rapid Publ., 7 (2012) 12048DOI: https://doi.org/10.2971/jeos.2012.12048