About: http://webisa.webdatacommons.org/153177779

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 discovered that ultrasonic sound waves at a frequency normally inaudible to humans can be effective to repel pests such as rodents and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com