About: http://webisa.webdatacommons.org/104006087

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	Holes or other like openings are provided on the lower housing of the measuring device, adjacent the speaker cone, to facilitate transmission of sound therethrough.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com