LinguaphoneyoudaoicibaDictYouDict[Linguaphone 词源字典]
"A trademark for: a language-teaching system based on the use of sound recordings in conjunction with textbooks; (also in early use) a set of equipment used for this", Early 20th cent.; earliest use found in Journal of Education. From lingua + -phone, after gramophone.[Linguaphone etymology, Linguaphone origin, 英语词源]