About: http://webisa.webdatacommons.org/14690741

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 system of claim 3, wherein said acoustic coupling unit permits sounds generated from other than said projector to reach said microphone.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com