Glossary
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The sound level as measured on a sound level meter using a setting that emphasizes the middle frequency components similar to the frequency response of the human ear at levels typical of rural backgrounds in mid frequencies. See Figure A1.
See how Noise Solutions Inc. helps quiet with Acoustical Ventilation
"Noise is one of the most important sources of environmental nuisance and a hazard to human health and welfare and that it is increasing in time and space."
Organization for Economic Co-operation and Development (OECD)