Day-night average stage, DNL or LDN: This measurement assesses the cumulative exposure to sound for just a 24-hour period (Leq over 24 hrs) in the 12 months, by using a ten dB(A) penalty or pounds additional to nighttime noise measurements provided the enhanced sensitivity to noise in the evening. Windows https://jaidenbppsw.blogaritma.com/30439159/what-does-sound-insulation-mean