The HearDefenders-DF® Attenuation Study was conducted from 50 dBa to 110 dBa verifying how attenuation values increase as noise levels increase. When compared to average performances from solid ear protection, HearDefenders-DF® clearly demonstrate the ability to hear critical acoustics (sounds) better while suppressing unwanted noise. The information above refers to attenuation provided when both filters are worn. Advanced filter technology improves speech and radio communication without distortion or muffling Use with one or two filters External filter is removable Optimal Acoustic Filtering Fit comfortably under helmets Floatable, moisture resistant Breathable filter allows for pressure equalization Can be used with cell phone Durable – last 2 – 3 years Easy to use and clean 3 Sizes for comfortable fit – S-M-L Available in black or orange Note: The U.S. Environmental Protection agency requires manufacturers to provide a Noise Reduction Rating (NRR) on all hearing protection type products being marketed into most commercial type accounts. According to E.P.A. Document 08AR-2003-0024, exception to this requirement may be granted to entities participating in National Security. OSHA regulations state volume levels of 80-85 dB are safe for an eight hour period of time. Please consult a hearing healthcare professional who can advise you about safety levels and appropriate filtering options. Click here for Declaration of Conformity PDF
