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Dark grey behind-the-neck ear muffs with black cups and wire headband

3M

3M H505B Behind-the-Neck Ear Muffs 17 dB personal protective equipment

SKU CH-P9M1-B2CFY MPN H505B

Behind-the-neck ear muffs with a 17 dB noise reduction rating, semi-soft cups and a wire headband for use with welding helmets

  • TypeHearing Protection
  • Behind-the-neck design fits under welding helmets
  • 17 dB noise reduction protects hearing in loud environments
  • Semi-soft cup surface cushions ears for extended wear
  • Two-point suspension distributes pressure evenly across the head
  • Lightweight at 0.4 lb reduces neck strain during long shifts

Behind-the-Neck Earmuffs for Welding

The 3M H505B is a new hearing protector with a rigid behind-the-neck wire headband and semi-soft cup surfaces. It carries a Noise Reduction Rating of 17 dB and meets CSA Class B standards. The black cups attach via a two-point suspension and weigh 0.4 lb.

Suited for Welders Needing Helmet Clearance

This design suits workers who must wear a welding helmet or other headgear simultaneously because the band rests behind the neck rather than over the head. It is not for users who require dielectric or electrically insulated protection, as the product is explicitly non-insulated. Buyers needing a higher attenuation rating should look at alternative models.

17 dB Noise Reduction Rating

The single figure that determines suitability is the 17 dB Noise Reduction Rating. If your environment demands more attenuation, this earmuff will not meet the requirement. Replacement pads are available under part number 30F056.

Highlights

  • Behind-the-neck design fits under welding helmets
  • 17 dB noise reduction protects hearing in loud environments
  • Semi-soft cup surface cushions ears for extended wear
  • Two-point suspension distributes pressure evenly across the head
  • Lightweight at 0.4 lb reduces neck strain during long shifts

Specifications

Brand3M
ModelH505B
TypeHearing Protection

Questions about this item

How does the 17 dB noise reduction rating hold up during a full shift of welding?

The 17 dB rating is a laboratory measurement; actual attenuation depends on fit, cup seal and the noise spectrum in your environment.

Will the rigid cups and wire headband become hot or uncomfortable after hours of wear?

The semi-soft cup surface and two-point suspension distribute pressure, but the rigid cup design limits airflow so heat build-up is possible in warm conditions.

Do I need a specific welding helmet or adapter to attach these behind-the-neck muffs?

They are designed for use with compatible welding helmets; the wire headband slots into helmet brackets, so you must already own a helmet that accepts behind-the-neck earmuffs.

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