About: http://webisa.webdatacommons.org/455952351

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	Conversely, a narrow directivity may be desirable to direct sounds such as voices, in only a predetermined direction in order to reduce room interaction caused by boundary reflections.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au