About: http://webisa.webdatacommons.org/425438339

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	It has been found particularly favorable to use a frequency range between 5 or 10 and 30 Hz, for example 25 Hz.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com