About: http://webisa.webdatacommons.org/100448555

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 invention is particularly characterized by a portion of at least the microphone input device, amplifier circuit and/or microphone output device being formed of MOS field-effect transistors.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com