megaphone loud-speaker loudhailer aerophone audio amplifier
"This is the police," came the amplified voice from the helicopter.
“我们是警察,”直升机上传来扩音器中的声音。
—— 柯林斯例句I distinctly heard the loudspeaker calling passengers for the Turin-Amsterdam flight.
我清楚地听到扩音器里在请都灵至阿姆斯特丹航班的旅客登机。
—— 柯林斯例句They plugged their guitars into amplifiers.
他们把吉他与扩音器相接。
—— 柯林斯例句Officials used loud hailers to call for calm.
官员们用扩音器呼吁大家保持冷静。
—— 柯林斯例句He called me over the Tannoy.
他用天朗扩音器喊我。
—— 柯林斯例句