About: http://webisa.webdatacommons.org/86011981

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	This is the designated reference signal to measure the acoustic propagation delay time from speaker to speaker in e.g. churches or auditoriums.
http://www.w3.org/ns/prov#wasQuotedFrom	nti-audio.com