TFTC #59 Notch Hook Ups: A Better Way to Run Helmet-Mounted Comms
Sherrilltree Feb 13th 2026Clear communication on a tree job isn’t optional. It’s a safety requirement.
Between saws, chippers, traffic, and the distance between climber and ground crew, yelling has never been a reliable solution. That’s why helmet-mounted communication systems have become common in arboriculture. They work. Crews stay connected. Jobs move smoother.
But most systems on the market were built by modifying standard earmuffs. This means drilling into them or routing wires through the cup. Even if the comms function properly, those modifications can compromise the hearing protection rating.
That’s where the Notch Hook Ups stand apart.
Purpose-Built and CE Certified
The Notch Hook Ups, when paired with SENA Work 4 or SENA 33i, are among the first CE-certified helmet-mounted communication systems built specifically for arborists.
Instead of modifying earmuffs, the Hook Ups are designed as a complete system. Each muff includes integrated speakers and a sealed rubber grommet molded into the housing to route wiring, which maintains the certified hearing protection rating.
No drilling.
No retrofitting.
No compromising your PPE.
CE certification means the system meets required standards for both hearing protection and electronic integration. In practical terms, you get clear communication without sacrificing certified protection.
Clear, direct communication between the climber and ground crew helps prevent mistakes, especially around roads, structures, and heavy rigging. It also reduces fatigue and long-term hearing strain from yelling over equipment.
Paired with SENA Work 4 or SENA 33i, the Hook Ups provide reliable communication built for real jobsite conditions.
Flexible Setup Options
Crews don’t all work the same way, so the Hook Ups are available in multiple configurations:
• Hook Ups earmuffs only (for those who already own comms)
• Hook Ups + SENA comms kits (to add comms to your helmet)
• Complete systems assembled with helmet, comms, and Hook Ups ready to go
If you already own SENA units but are running modified muffs, the Hook Ups give you a fully certified replacement.
Raising the Standard
For years, modified earmuffs were considered “good enough.” The Notch Hook Ups raise the bar.
They’re purpose-built. They’re certified. And they let you run helmet-mounted communication without altering your hearing protection.