About: http://webisa.webdatacommons.org/405915419

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	The sound source levels would depend on how many speakers are used, how loud the amplifier is set to, the types of calls used, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	federalregister.gov