Definition and Citations:
The measure of loudness or signal strength. 70db at 3 feet is normal. 90db is ok for workers for eight hours. It is named in honor of Alexander Graham Bell. If changes by a factor of 10.
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The measure of loudness or signal strength. 70db at 3 feet is normal. 90db is ok for workers for eight hours. It is named in honor of Alexander Graham Bell. If changes by a factor of 10.