Wireless Microphone Spectrum Alliance Pushes for Spectrum Access

With major U.S. events like the Super Bowl, FIFA World Cup, America 250 and the 2028 Olympics becoming ever more important for broadcasters, the Wireless Microphone Spectrum Alliance (WMSA) has been highlighting the need for spectrum to operate wireless microphones. This spectrum is particularly critical for high-profile events that include global broadcasts, multiple live performances, in-game/in-event announcements, and more, the group said.
The push to raise awareness about the importance of spectrum for the production of major events comes at a time when the Federal Communications Commission is planning to auction off more C-Band spectrum and the U.S. Congress has authorized spectrum sales.
WMSA was formed last year in an effort to raise awareness with the FCC, Congress, the White House and NTIA about how critical wireless microphones are to live performance, broadcast and cultural events, the association said. Comprised of a coalition of manufacturers, audio engineers and broadcast professionals, WMSA’s mission is to preserve and protect spectrum for professional wireless use so events like these can proceed with uninterrupted audio quality.
For example, the events surrounding the Super Bowl create a major demand on radio frequency spectrum for wireless microphones. It is the most amount of wireless deployed for a single sporting event and these requirements continue to increase.
[Related: “WMSA Puts the Spotlight on Sound”]
For such events, WMSA noted that producers require:
- Massive scale: Hundreds of wireless channels are needed for talent, crew, referees and sideline personnel.
- Frequency coordination: Game Day Coordinators allocate spectrum, prioritizing operations, venue, teams and broadcasters.
- Interference mitigation: Professional audio engineers use techniques like multiplexing, directional antennas, and meticulous frequency planning to help prevent signal clashes.
- Equipment: High-end wireless systems, specialized software and robust distribution gear are essential.
Across all platforms, use of wireless microphones supports content creation sectors valued at approximately two trillion dollars in economic value globally and poised to pass three trillion dollars by 2025, according to A. Guttman.
WMSA believes that spectrum is under threat as the remaining spectrum accessible to wireless microphones in the 470–608 MHz band – which is shared with broadcasters, white space devices, public safety operations, etc. – is insufficient.
For example, spectrum scans taken in various U.S. cities after 2017, following the incentive auction and loss of access to the 600 MHz band, show limited or no available TV channels for wireless microphones.
This has necessitated an increasing reliance on Special Temporary Authority (STA) grants by the FCC to access spectrum typically not allowed for wireless mics in order to support medium and large-sized events. However, STAs are ad hoc, unpredictable, burdensome on staff and, according to the WMSA, simply not a viable long-term solution to this continuing and growing need.
Data from the Paris 2024 Olympic Games revealed that 89 percent of all audio links used were within the 470–694 MHz range.
WMSA has recently met with the FCC and other organizations in Washington, D.C., to work on solutions for this to help preserve existing spectrum and get access to new spectrum for wireless microphones. WMSA is encouraged by the progress of those meetings.
The current focus on spectrum for commercial 6G use is on bands above 2.5 GHz and not on the TV-UHF band used by wireless mics. However, WMSA continues to remain vigilant that the focus does not shift to the TV-UHF frequency range.
WMSA said it has successfully engaged with relevant U.S. Federal agencies to secure access to additional spectrum.
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