What is a wireless microphone system ?

　　The most commonly used wireless microphone and IEM operate in the UHF band from 450MHz to 698MHz, the 1.9GHz DECT band and the 2.4GHz band, but different regions may have specific restrictions on the parts of these ranges that can be legally used. There are also some VHF or UHF spectral ranges that can be used, such as 902MHz to 928MHz, but the legitimacy to operate these frequencies also varies by region.
　　Each range of operations faces unique challenges. The 450MHz to 698MHz range is generally suitable for high-channel-count systems or systems that require operating ranges over about 30 meters. The challenge is that this range is also typically used for terrestrial mobile wireless communications, public safety and television broadcasting, and their transmit power usually far exceeds wireless microphone and IEM systems. As a result, wireless microphone and IEM systems must circumvent these existing services, which is a challenge in areas where the available spectrum is limited.

　　BY-WM5 Wireless Microphone
　　BOYA BY-WM5 wireless microphone is for use with DSLR cameras, camcorders. The 2.4 GHz GFSK system result in strong anti-interference, good security and stability.
Wireless microphone
Now that we have a basic understanding of the common frequencies used for Wireless microphone and IEM operation, the first question most audio engineers have raised is: Why do I need to convert an audio signal to a high-frequency radio and transmit it wirelessly?
　　There are two equally important reasons. First of all, it is basically impossible to transmit audio signals from the original frequency of 20Hz to 20kHz because the antennas required for effective propagation may be up to several miles. Second, even if the length of the antenna is not a limiting factor, radio frequencies transmitted at a frequency of 20 Hz to 20 kHz are also disturbed and destroyed. If you use high-frequency carrier for wireless transmission, you can design a smaller antenna to help avoid interference.

　　The term "modulation" refers to the process of superimposing baseband information on a high frequency signal for efficient wireless transmission. For example, in an IEM system, a transmitting device receives an audio input signal.

BOYA wireless microphone
Shotgun microphone system
Stereo microphone system
Lavalier microphone
BY-M4C Lavalier Microphone
BY-M4OD Lavalier Microphone
ENG/broadcast microphone
Conference microphone system
BY-MC2 Conference Microphone
Smartphone microphone
BY-WM4 Wireless Microphone


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