An electroacoustic transducer operating from an electrical system to an acoustical system and designed to radiate sound.
"Just wanted to let you know that the MP3s you sent made my day! That record was the only record my brothers and I listened to when we came to this country about 60 years ago. Maybe it helped us learn English - I can't say. One thing for certain is that to this day we use some of the expressions from the story in our casual conversations with ..."