Wireless microphones have a number of advantages and disadvantages. The following discussion will address this data on professional-grade label microphones, videoke microphones, and wireless microphones.
Performers, especially dynamic ones, can put an end to tangled cords that can even cause them to trip. They can move around the stage without worrying about not being heard. Wireless microphone is actually a technical misnomer because you still use wires. The “wireless” in the term actually refers to the cable that connects the device to the amplifier. Various technologies are used to establish this transmission without the standard cable. Some of these devices use infrared light very similar to the technology used in remote controls. The most common use radio waves transmitted through UHF, VHF, Fm, Am, and many other modulation frequencies.
One of the advantages of a wireless microphone is, as we have mentioned, the freedom of movement that it gives the interpreter or speaker. It can also eliminate the most common wiring problem (especially for old-fashioned cables), which is internal wires breaking their connection from time to time, causing sound to come out intermittently.
The downside to these wireless gadgets is that their range is limited to a 300ft (100m) radius, although higher-end models can easily exceed this range. Interference from and with other radio equipment or other wireless microphones cannot be avoided, although the latest models come with synthesized frequencies that can be changed to other channels.
They have limited operating time because they rely on batteries for their power source. There are some areas where noise is generated while in some areas there are dead spots. The number of units operating in the same area at the same time is limited by the number of radio channels the devices are capable of.
The wireless system consists of an input device, a radio transmitter and a receiver. The input device, which is a microphone, supplies the audio signal. The signal is then sent by the transmitter and received by the receiver.
These microphones can be grouped into portable and body-worn. Handheld units are much like your regular microphone, except instead of a cable, you have a battery and transmitter. The beltpack microphone is made up of a box as small as a deck of cards. Clips close to the user’s body. It can be connected to a headset microphone, a lavalier microphone, or an instrument such as a guitar.