1.
A new, unseen voice was booming through the PA system.
一个新的，看不见的声音从扩音机里嗡嗡地传来。
2.
Ten minutes later Sutherland grabbed a microphone.
十分钟后，萨瑟兰抓住扩音机话筒。
3.
On Matching Method and Points of An Audio Amplifier and A Loudspeaker
扩音机与扬声器配接方法和配接要点
4.
GY2×275W Loudspeaker-based Industrial Intercome System
基于GY2×275W扩音机的工业对讲系统
5.
Fundamental parameters and general requirements of audio frequency power amplifier (megaphone)
GB/T1982-1980声频功率放大器(扩音机)基本参数与一般技术要求
6.
What are the chances that I will blow one of my stereo speakers if I turn my 200-watt amplifier up to wide open?
如果把200瓦的扩音机开到最大，立体声喇叭烧坏的可能性有多大？
7.
The conference hall was installed with radio set and megaphone.
会场里设置了收音机和扩音器。
8.
I hear they is announcing my flight over the public address system.
我听到扩音器在播我的班机信息了。
9.
An instrument that converts sound waves into an electric current, usually fed into an amplifier, a recorder, or a broadcast transmitter.
扩音器,麦克风,话筒将声波转变成电流的工具,通常接至扩音器,录音机或广播发射机上
10.
The Study of an Intelligent Non-central Switching Explosion-proof Amplifying Call and Telephone Talk System;
智能型无主机防爆扩音对讲电话系统的研究
11.
Will you need a microphone and speakers, overhead, slide or movie projector, or cassette tape deck?
您需要麦克风和扩音器、耳机、灯片或电影放映机或是卡带架装置吗？
12.
A funnel - shaped device used to direct and amplify the voice.
扩音器用来传声或扩音的漏斗形装置
13.
To amplify(music)by electronic means.
以电气扩大音响以电子手段为（音乐）扩音
14.
The solution of expanding the telephone exchanger's traffic capacity using the IP telephone technology
利用IP电话技术解决语音交换机的话务扩容问题
15.
addressed us over the loudspeaker
透过扩音器对我们演讲
16.
Hearing Aid and Amplification System
助听器与声音扩大系统
17.
A loudspeaker magnifies the human voice.
扬声器扩大人的声音。
18.
Surround amplifier
环绕立体声打扩音器