TOP NOISE REDUCTION SECRETS

Day-evening normal stage, DNL or LDN: This measurement assesses the cumulative exposure to sound for a 24-hour interval (Leq in excess of 24 hrs) of the 12 months, with a 10 dB(A) penalty or excess weight added to nighttime noise measurements offered the improved sensitivity to noise at nighttime.From this, we could see that a double glazed window