Day-night time typical amount, DNL or LDN: This measurement assesses the cumulative exposure to sound for your 24-hour time period (Leq around 24 hrs) in the calendar year, using a ten dB(A) penalty or excess weight extra to nighttime noise measurements given the greater sensitivity to noise during the night. https://lanepydhm.bloggactif.com/33217671/how-soundproofing-can-save-you-time-stress-and-money