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…of sound pressure level that is a logarithmic and dimensionless. Hertz (Hz) --- Unit of measurement of frequency, numerically equal to cycles per second. Noise --- In general, noise is considered to be any unwanted sound. Noise dose --- The ratio, expressed as a percentage, of (1) the time integral, over a stated time or event, of the 0.6 power of the…
https://www.wichita.edu/services/environmental_health_and_safety/hearing_protection.php