About: http://webisa.webdatacommons.org/227727002

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	If the audio source is plugged into a different circuit especially if the circuit is the other phase improper grounding can cause a hum.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com