Using individual devices in combination provides the best hearing protection. While individual devices are not foolproof, virtually all noise-induced hearing loss is preventable if these devices fit properly and are worn on all flights. Even if hearing has already been affected somewhat, these devices will help prevent further damage. Hearing protection is ultimately each individual's responsibility. Aircraft noise levels interfere with the speech communication of Army aircrew members and pose the risk of hearing loss.
Protective measures can reduce the undesirable effects of noise.
Isolation or distancing of crew members from the noise source. The helmets, designed primarily for noise protection, provide noise attenuation exceptionally well in the range of 3,000 to 8,800 hertz. Flight Helmet 7-32. Table 7-6 shows the estimated attenuation levels for various types of helmets. Ancillary devices worn with the aviator's helmet can significantly compromise hearing protection.