Sennheiser Seeks FCC Action on Wireless Mic Rules
Sennheiser urged FCC action on wireless multichannel audio systems rules, teed up in an April NPRM (see 2104220056), in a call with staff from the FCC Wireless and Media bureaus and the Office of Engineering and Technology. The company has…
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a “unique WMAS design” using “only 50 mW of power, the same amount of power that a single conventional narrowband microphone utilizes, even when a large number of audio channels are connected to the base,” said a filing posted Friday in docket 21-115: “Since the power is spread over 6 MHz of bandwidth, as opposed to conventional narrowband microphones, which concentrate that power in 200 kHz, there is much lower power spectral density, resulting in less opportunity for interference and greater spectrum reuse.” The company stressed “these benefits … significantly decrease” if operated using less than 6 MHz. Sennheiser also urged the FCC to set aside a vacant UHF TV channel for wireless microphone use across the U.S. “Microphones operating on low-band UHF TV band spectrum are the only ones that can deliver the fault intolerant reliability, compact size and battery life that film, TV and theater producers demand,” the company said.