About: http://webisa.webdatacommons.org/281184321

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 frequency of the reciprocating back-and-forth motion may be between about 130 Hz and about 200 Hz, in particular at about 164 Hz.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com