About: http://webisa.webdatacommons.org/45415274

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 you sit and listen there is always low frequency noise present in any quiet background and it can be produced by things such as machinery and transport or natural sources such as the sea, wind and thunder.
http://www.w3.org/ns/prov#wasQuotedFrom	windmeasurementinternational.com