![]() Those early systems used the 700 MHz band, which worked well for everybody who used them for the next 20 years or so. That increased the need for discreet wireless microphones. There wasn’t a huge demand for wireless microphone systems until the 1980’s, when theatre productions with more actors on stage meant more microphones were necessary. It was twenty years later before audio company Nady Systems improved that by introducing companding, which is the process of compressing the dynamic range of a signal before transmitting it to the receiver. While that was hardly convenient, the biggest problem was poor sound quality. It held six D-cell batteries and could last for 90 minutes. One company, Sennheiser, offered a wireless microphone that had a box about the size of two water bottles that hung on one’s back and had an antenna that came up the back of a jacket and clipped to the collar. At that time, the microphone could only go about fifteen feet away from the receiver. Wireless microphone systems were first invented in the 1950’s when several companies and individuals patented their own products. The way show choirs use wireless microphones will be forever changed by July 13, 2020, which is he last day wireless mics will be allowed to operate in the 600 MHz service band, by order of the Federal Communications Commission.įor many, however, that forced change will come much sooner. ![]()
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