Working day-night common degree, DNL or LDN: This measurement assesses the cumulative exposure to sound for the 24-hour period of time (Leq about 24 hrs) with the year, using a ten dB(A) penalty or pounds added to nighttime noise measurements given the elevated sensitivity to noise during the night time. https://soundinsulation00987.popup-blog.com/31348584/an-unbiased-view-of-window-insulation