DOUBLE GLAZING BENEFITS THINGS TO KNOW BEFORE YOU BUY

Day-night normal amount, DNL or LDN: This measurement assesses the cumulative publicity to sound for the 24-hour time period (Leq about 24 hrs) of the calendar year, by using a 10 dB(A) penalty or body weight added to nighttime noise measurements provided the elevated sensitivity to noise during the night time.Superior noise degrees can contribute