Reference tone
http://dbpedia.org/resource/Reference_tone an entity of type: Colour
A reference tone is a pure tone corresponding to a known frequency, and produced at a stable sound pressure level (volume), usually by specialized equipment.
rdf:langString
rdf:langString
Reference tone
xsd:integer
18675102
xsd:integer
960020598
rdf:langString
A reference tone is a pure tone corresponding to a known frequency, and produced at a stable sound pressure level (volume), usually by specialized equipment.
xsd:nonNegativeInteger
2150