02705944-n
(1)
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electronic equipment that increases strength of signals passing through it |
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02917377-n
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| 手提式扬声机, 手提式 扩音器, 手提音响, 手提 音响, 手提式 扬声机, 扩音器, 手提式扩音器 |
| bullhorn, loud hailer, loud-hailer |
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a portable loudspeaker with built-in microphone and amplifier |
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03743279-n
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| 传话筒, 传声筒, 扩音器, 喊话筒 |
| megaphone |
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a cone-shaped acoustic device held to the mouth to intensify and direct the human voice |
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03691459-n
(3)
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| 扬声器, 喇叭, 扩音机, 扩音器 |
| speaker, loudspeaker, speaker unit, loudspeaker system, speaker system |
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electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance |
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03759954-n
(5)
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| 话筒, 麦克风, 扩音器 |
| microphone, mike |
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device for converting sound waves into electrical energy |
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04292572-n
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| 扬声器, 扩音器 |
| squawk box, squawker, intercom speaker |
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the loudspeaker on an intercom or public address system |
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