Universal Ear Defender

Serious Noise. Serious Protection. Job sites are loud. The ED-3B is built to handle it. These passive helmet-mounted ear defenders deliver NRR 26 dB noise reduction and integrate directly with most Type I and Type II industrial safety helmets via a universal 30mm blade mount. No separate headband. No fumbling. Hearing protection that stays out of your way until you need it — and locks in place when you do. Why the ED-3B Three Positions. One Smooth Motion. The ED-3B arm assembly moves between three positions without removing your helmet: Working Position — Cups pressed firmly against ears for full noise attenuation Standby/Ventilation Position — Cups clicked slightly outward for short breaks without removal Parked Position — Cups rotated up onto the helmet shell for unobstructed work Dielectric Construction. Built for Electrical Environments. The arm assembly is made from non-conductive dielectric plastic — designed for workers in or around electrical hazards where metal components aren't an option. A Seal That Holds. Polyether foam cushions with PVC foil backing form an acoustic seal that conforms to your head and holds position across full shifts. The pivoting cups maintain consistent ear contact whether you're working overhead, crouching, or turning. Balanced. Lightweight. All Day. At 248 grams for the pair, the ED-3B is designed to minimize side-weight imbalance on Type II helmets. ABS ear cups resist impact and UV degradation without adding unnecessary weight. Specifications NRR (US/ANSI) 26 dB Test Standard ANSI S3.19-1974 International Compliance EN 352-3:2020 Certifications CE, UKCA Helmet Compatibility Type I & Type II industrial safety helmets Mounting Universal 30mm Euro Slot / Blade Mount / P3E Adapter Arm Type Dielectric (non-conductive) plastic Cup Material ABS – impact and UV resistant Cushion Material Polyether foam + PVC foil Positioning Working / Standby / Parked Weight (each) 124 g / 4.37 oz Weight (pair) 248 g / 8.74 oz Length (collapsed) 7.0 inches Length (extended) 8.0 inches Ear Cup Width 2.75 inches Ear Cup Height 4.0 inches Operating Temp -20°C to +55°C Chemical Resistance Industrial oils, sweat Visor Compatible Yes What's in the Box? 1 Pair STUDSON ED-3B Helmet-Mounted Ear Defenders Mounting adapters Compatible With STUDSON Safety Helmets The ED-3B mounts directly to STUDSON's SHK-1 Full Brim and Cap Style safety helmets. Build out a complete protection system — head, eyes, and ears — without switching brands or compromising fit.