About: http://webisa.webdatacommons.org/311551663

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	to about 20 kHz, including all values and increments therein, at a pulse width from about 5 microseconds to about 40 microseconds, including all values and increments therein.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com