Ο χρήστης NIOSH στο Twitter: "Know your noise level! Download the @NIOSHNoise Sound Level Meter app today. It's free in the app store. It's available in Spanish too! #ProtectYourHearing https://t.co/axN8XWStPA #NPYHM https://t.co/zfwN8FPPbc" /
File:NoiseLevel LeafBlower.jpg - Wikipedia
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File:Noise level from a lawn mower measured using the NIOSH Sound Level Meter app.jpg - Wikimedia Commons
New NIOSH Sound Level Meter App Available Now!"
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