Working day-night time ordinary amount, DNL or LDN: This measurement assesses the cumulative exposure to sound for just a 24-hour time period (Leq about 24 hrs) from the year, which has a 10 dB(A) penalty or pounds added to nighttime noise measurements given the increased sensitivity to noise at night. https://josuerajvb.spintheblog.com/32493664/how-soundproofing-can-save-you-time-stress-and-money