The name Etymotic means true to the ear. Etymotic’s products are used by scientists, hearing practitioners, hearing-impaired consumers, professional and amateur musicians, and others who insist on superior sound quality. Etymotic High-Definition Series Electronic Earplugs were developed to mitigate hearing damage and tinnitus sustained by an alarmingly high percentage of deployed soldiers. Despite risks to hearing from loud machinery and blasts, most warriors decline to wear hearing protection because they find it interferes with situational awareness. These earplugs are designed to restore sound that is blocked when the ear canal is sealed. They allow you to hear naturally, as though there were nothing in the ears, and prevent ear damage from loud impulse noise using a new adaptation of the original high-fidelity K-AMP integrated circuit. GSP-15 earplugs are for gun sport enthusiasts who need protection from firearm blasts, but also need protection from loud continuous noise from vehicles, machinery, or repeated gunfire from nearby shooters. Ideal for gun sports in the field or at the range where enhanced awareness, clear communication and blast protection are desired. GSP-15 earplugs allow natural hearing when no background noise is present and gradually protect from loud continuous noise. At the flip of a switch sound is amplified, improving distance detection up to five times for enhanced awareness. GSP-15 electronic earplugs use Etymotic"s ACCU-Technology with high-definition balanced armature drivers, high-sensitivity microphones and proprietary wide-dynamic-range compression K-AMP signal processing. Since 1983, Etymotic products have improved the lives of those with hearing loss, protected hearing, and enhanced the listening experience of musicians and music lovers everywhere.