VHF stands for "Very High Frequency", which translates to very high frequency. In the context of microphones, it is a technology for wireless transmission of audio signals. The microphone acts as a small transmitter that sends sound to a receiver connected to the sound equipment. This transmission takes place in a defined frequency band, usually in the range 174 to 216 MHz. This band is also shared with other services such as television broadcasting, making VHF systems more susceptible to signal interference. This can result in crackling or short-term audio dropouts, especially in areas with heavy radio traffic. The signal also generally has a shorter range and is more sensitive to physical obstructions such as walls. The number of available channels on which microphones can operate is limited in this band, which complicates the use of multiple wireless systems in one location at the same time. VHF technology is older and simpler, and is now mainly used in low-maintenance applications such as home karaoke sets or presentations in environments without the risk of heavy interference.
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