帮忙写个无线麦克风的英文说明书````

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Wireless Microphone
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The advantages are:

Greater freedom of movement for the artist or speaker.
Avoidance of cabling problems common with wired microphones, caused by constant moving and stressing the cables.
Reduction of cable "trip hazards" in the performance space

Techniques

The professional models transmit in VHF or UHF radio frequency and have 'true' diversity reception (two separate receiver modules each with its own antenna), which eliminates dead spots (caused by phase cancellation) and the effects caused by the reflection of the radiowaves on walls and surfaces in general. (See antenna diversity).

Another technique used to improve the sound quality (actually, to improve the dynamic range), is companding. Nady Systems, Inc was the first to offer this technology in wireless microphones in 1976, which was based on the patent obtained by company founder