OTTO’s NoizeBarrier™ High Definition Electronic Earplugs offer unsurpassed situational awareness and clear communication while also providing hearing protection from loud noises. The dual-mode NoizeBarrier™ earplugs offer active hearing protection as well as hearing enhancement for extremely effective sound localization and detection.

The noise-isolating eartips combined with proprietary sound processing electronics produces an earplug that responds to your environment. The earplugs provide normal situational awareness when sound levels are safe, a higher level of protection (up to 15 dB) when there is sustained loud noise, and maximum protection (up to 40 dB) from loud impulse noises.

With a simple press on the touch pad, the enhanced hearing mode provides 5X amplification of soft sounds, while maintaining the impulse noise protection. NoizeBarrier earplugs can be worn all day without the need to remove them to hear.

The earplugs have up to 16 hours of battery life and come with a rugged, waterproof case for earplug storage and charging.


  • Up to 40 dB of impulse noise protection
  • Up to 15 dB of adaptive noise attenuation
  • Hearing enhancement mode – amplifies soft sounds up to 5X
  • Natural hearing for safe sounds
  • Accu-Technology® high-definition sound quality
  • One-button touch pad, 2-mode operation
  • Rechargeable with up to 16 hours of continuous use
  • Earpiece and case IP67 waterproof
  • Charging status LCD panel
  • 1-year warranty



  • NRR: 26 dB (Foam Tips); 25 dB (3-Flange Tips)
  • Frequency Response: 40Hz-16kHz
  • Transducers: Balanced armature receivers (speakers)
  • Wide bandwidth, low-noise MEMS microphones
  • Battery Performance: Earplugs: Up to 16 hours, Charge Station: 20 earplug charge cycles


Rugged Charging Case Fully charged waterproof case provides multiple earplug recharges for up to 30 days 

Maintenance Kit Filter cleaning kit 

High-Definition Earplugs 2-mode waterproof earplugs provide up to 40 dB of blast protection and amplify soft sounds up to 5x 

Assorted Eartips Includes multiple reusable eartip sizes for a perfect fit 

Call for assistance: +44 (0) 1335 360 157