https://www.cdc.gov/niosh/noise/about/app.html?CDC_AA_refVal=https%3A%2F%2Fwww.cdc.gov%2Fniosh%2Ftopics%2Fnoise%2Fapp.html
NIOSH Sound Level Meter App | Noise and Hearing Loss | CDC
The NIOSH Sound Level Meter app measures workplace noise to determine if the levels are damaging.
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