Selective Hearing
Originally developed for soldiers, these earplugs can muffle loud noises while admitting or amplifying soft ones. This allows soldiers (or hunters or construction workers) to listen to conversations and other important sounds around them while protecting their hearing from the din of machinery or deafening blasts.
Product: EB15
Cost: $500
Availability: Now
Source: www.etymotic.com
Companies: Etymotic Research
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