About: http://webisa.webdatacommons.org/235592040

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	Once the sound changes frequency, the vibrating alarm alerts the user that there is a situation going on and they need to leave the area.
http://www.w3.org/ns/prov#wasQuotedFrom	yankodesign.com