Day-night normal degree, DNL or LDN: This measurement assesses the cumulative exposure to sound for a 24-hour interval (Leq over 24 hrs) on the 12 months, with a ten dB(A) penalty or excess weight added to nighttime noise measurements offered the improved sensitivity to noise at nighttime. You could find https://noisepollution73790.widblog.com/87136583/the-definitive-guide-to-energy-efficiency