Impact PRSMA-VC-AT1-SH 2.5L 2.5mm Listen Only Earpiece with Volume Control 2-Wire and that piece of sound

and that piece of sound partially cancels out the incoming noise

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Impact PRSMA-VC-AT1-SH 2.5L 2.5mm Listen Only Earpiece with Volume Control 2-Wire and that piece of soundImpact PRSMA VC AT1 SH 2. 5L Platinum Listen Only Earpiece with Acoustic Tube and Volume Control for speaker mic. 2. 5mm right angle connector. 9 inch coiled cable (relaxed). This is a professional grade listen only kit to use with your Impact or other brand speaker microphones. This earpiece is the ideal solution for the professional user who can't afford anything less than the best! Used by thousands of law enforcement agencies, security companies,