EAR DEFENDER- UNIVERSAL- FITS WIDE BRIM & STANDARD HELMETS

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.