3.22 sound exposure level. Ten times the logarithm to the base 10 of the ratio of a sound exposure to the reference value....
3.19 day-night-average sound level. On a given day of the week, twenty-four-hour average frequency-weighted sound level after addition of 10 decibels to levels from midnight to 0700 hours and from 2200 hours to midnight. Unit, decibel (dB); abbreviation,...
3.18 night-average sound level. Time-averaged frequency-weighted sound level between 0000 and 0700 hours and 2200-2400 hours. Unit, decibel (dB); abbreviation, NL; symbol, Ln....
3.17 day-average sound level. Time-average frequency-weighted sound level between 0700 and 2200 hours. Unit, decibel (dB); abbreviation, DL; symbol, Ld....
3.16 one-hour-average sound level. Time-averaged frequency-weighted sound level during a time period of one hour. Unit, decibel (dB); abbreviation, 1 HL; symbol,...
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