About: http://webisa.webdatacommons.org/326348959

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	Applying an alternating voltage, such as a square wave, will cause the material to vibrate and create a sound.
http://www.w3.org/ns/prov#wasQuotedFrom	northwestern.edu