About: http://webisa.webdatacommons.org/91898226

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	FIG. 4 is an example illustrating the combining of continuous wave driving signals of different phases, applied to multiple elements of the transducer to change the focal point of the acoustic beam.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com