| earphone | (noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear | Synonyms: earpiece, headphone, phone |
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| earpiece | (noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear | Synonyms: earphone, headphone, phone |
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| earplug | (noun) a plug of cotton, wax, or rubber that is fitted into the ear canal for protection against the entry of water or loud noise | - |
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| (noun) an earphone that is inserted into the ear canal | - |