Microphone
/mˈaɪkrəˌfoʊn/
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Definition
(noun) A device (transducer) used to convert sound waves into a varying electric current; normally fed into an amplifier and either recorded or transmitted over radio.
Sentence Examples
The microphone is live.
The guide is using a microphone for us to hear her better.
CEFR Practice Quiz
The public speaker adjusted his ____ before beginning the presentation to ensure that everyone in the large hall could hear him clearly.