About: http://webisa.webdatacommons.org/216264006

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 ground reference level that accompanies the microphone signals, however, compensates for any unaccounted for offsets of the signals going through the system by including the offsets in determining a reference for absolute zero.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com