Complex sentence: The source of the noise has not been confirmed despite months of effort and investigation, earning thevillage a place on the World Hum Database, on which similar reports of noise have been reported from Garelochhead and the outskirts of Helensburgh-near the MOD facility at Faslane.
Split into simpler sentences: The source of the noise has not been confirmed despite months of effort and investigation, earning the village a place on the World Hum Database. Similar reports of noise have been recorded on this database from Garelochhead and the out-skirts of Helensburgh-near the MOD facility at Faslane.