Digital wireless microphone system provides high quality transparent audio. This is largely due to the absence of a “compression expander” for digital wireless microphone system, which is a circuit for all analog wireless microphone systems to reduce noise and maximize dynamic range. Audio signals are compressed through transmitters to accommodate the limited dynamic range during FM transmission, and then expand in receivers.
Although the compression and expansion process is relatively small in most excellent analog systems, there will still be some artificially audible sounds (such as the wheezing effect) that will make the sound of wireless microphones slightly different from that of wired microphones. Since the use of digital wireless microphones, the transmission of audio signals no longer requires compression and expansion, and the received signals restore the precise characteristics of the original audio.
Compression expander (variable)
A digital wireless microphone system can reach the whole audible audio range with a flat frequency response curve.
Digital wireless system converts analog audio into digital signal by modulating radio carrier in several steps. The digital audio signal reach the receiver without the influence of electromagnetic noise. Any RF noise below the threshold does not affect audio quality. The receiver simply ignores anything that is not 1 or 0. Everything else is discarded. Only digital signals can be identified.
Longer battery life
Usually, the electronic wireless microphone system has a 30% to 40% longer battery life than the same analog system. The digital signal transmitter can run for 11 hours with two AA alkaline batteries.
Better spectral efficiency
By allowing tighter channel spacing, digital wireless systems can simultaneously use more effective compatible frequencies within a certain frequency band. This feature is particularly important in the increasingly crowded UHF TV bands operated by many wireless microphones. With the help of manufacturers and models, digital wireless systems can usually deliver twice as many frequencies as analog wireless systems can use.