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Eight Pairs of Earplugs in Four Noisy Settings: My Hearing Protection Experiment — Hearing Health Foundation
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Amazon.com: Alpine Pluggies Kids Ear Plugs for Small Ear Canals - Noise Cancelling Earplugs for Kids Age 5-12 - Multi-Purpose Kids Ear Protection - 25dB - Reusable Hypoallergenic Filter Earplugs : Health & Household
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