40dB Noise Cancelling Earbuds: With 3-layer structure, the NRR can be up to 40dB, twice higher than ordinary earplugs. If you wear these high fidelity
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Is there a comfortable noise reduction alternative to earplugs for use in bed? - Quora
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The 9 Best Earplugs for Sleeping for 2023, Tested and Reviewed
Reusable Safe Silicone High Fidelity Earplug for Sleeping (Reduce 40dB) Swimming Studying Concerts Noise Cancelling and Hearing Protection (Gray)