U wave band(860MHz) frequency modulation wireless microphone transmitter and receiver with dynamic pressure-expansion and mute function was designed by selecting the SL5020P for compressing and expanding the dynamic range of an audio signal,the TX14570L for discriminator,RO2164D and hypercap diodee for frequency modulator.
选用音频动态压扩器SL5020P、鉴频器TX14570L、声表面波滤波器RO2164D和变容二极构成调频器,设计并制作了一种具有动态压扩和静音功能的U波段(860MHz)调频无线话筒发射和接收机,给出了完整电路,并较为详细地阐述了设计思路。
This paper introduced the basic requirements for wireless microphone used in multimedia classroom and the basic characteristics of wireless digital audio chip nRF24Z1.
简述了多媒体教室无线话筒的基本要求和无线数字音频芯片nRF24Z1的基本特性。
4-channel crystal-controlled wireless microphone receiver
4频道晶体控制无线话筒接收机
Design of Random Matching Digital Wireless Microphone Oriented Multi-media Classroom
面向多媒体教室的任意配对数字无线话筒设计
Technique of Random Matching of Wireless Microphone and Receiver in Multi-media Classroom
多媒体教室无线话筒和接收机的任意配对技术
"Radio microphones catch all accompanying sound. They hang at the end of long. booms, out of the camera range, and follow the performers as they move."
无线话筒用来传送所有的伴音。话筒吊在长长的吊杆顶端，在摄像镜头之外，跟着演员移动。
We require wireless Microphone systems with headset microphone( see attached photo) complete with transmitter/ receiver, we do not require the headsets with the earphone speaker, just the microphone.
我们正在采购无线话筒系统,带耳机(图0,有完整的变压器,接受器,话筒不硬性要求。
the telephone wire that connects to the handset.
连接电话听筒的电话线。
Pick up the telephone handset and dial (or ask the operator to dial). Press OK immediately after dialing. Wait for the handset to go dead before replacing it.
拿起话筒拨号(或请接线员拨号)。拨号后立即按“确定”，并等到话筒无声后挂断。
Pick up the handset and dial (or ask the operator to dial). After dialing is complete, click OK. Listen to handset until silent, and then hang up
拿起话筒拨号(或请接线员拨号)。拨号完成后立即单击“确定”，并等到话筒无声后挂断
An example is Bluetooth, which is used to link mobile phones with earpieces.
如篮牙技术，它通过无线听筒设备与移动电话相连。
General;Dial;Pushbutton;Multiple Lines;Coin Box;Speaker Phone;Amplified Phone
常规;拨号;按键;复式线;投币盒;话筒电话;增音电话
When the level of the MIC input is too big, and cannot be controled by the MIC input level adjustmeng potentiometer, push down this button.
话筒输入衰减按键:当话筒输入电平太大,话筒输入电平调节电位器已无法控制时,按下此键.
wireless telephone
ph.1. 无线电话
Input for 2 line , 2 switchable phone/line, 1 mic/ aux.
2线路,2可切换唱机/线路,1话筒/辅助输入。
VHF radio telephone transmitter
甚高频无线电话发话器
relating to or by means of radiotelephony.
关于无线电话，或以无线电话为工具。
maritime radio telephone
船舶无线电话船用无线电话
The part of a telephone that contains the connecting switch upon which the receiver and mouthpiece unit is supported.
叉簧电话机中包括接线开关、搁电话听筒和送话器的那部分
a telephone that communicates by radio waves rather than along cables.
用无线波多于用电话线传输的电话。
