About: http://webisa.webdatacommons.org/440914806

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 most important thing is that all speakers have a direction, either horizontal or vertical, along which they exhibit much less (possibly zero) difference in phase relationship as you move along that axis.
http://www.w3.org/ns/prov#wasQuotedFrom	gearslutz.com