loudspeaker

Everyday

1. A device that turns electrical signals into sound and makes voices or music louder, so many people can hear. tree →
2. «On loudspeaker» (on a phone) means so everyone in the room can hear. tree →

In the lessons

In science lessons on sound and electricity: a loudspeaker has a magnet and a coil that make a cone vibrate, which pushes air and makes sound waves. In safety: announcements in stations, schools and fire drills come «over the loudspeaker». Shorter word: «speaker».

Examples

• The head teacher spoke over the loudspeaker. tree →
• An announcement came over the loudspeaker at the train station. tree →
• The loudspeaker makes the music loud enough for the whole hall. tree →
• Put Granny on loudspeaker so we can all say hello. tree →
• Inside a loudspeaker is a magnet and a cone. tree →
• The fire alarm instructions came through the loudspeakers. tree →

Note

One word: loudspeaker. Countable. Often just «speaker», which can also mean a person who speaks — read the context. Loud sound from speakers close to your ears can damage hearing.