DOUBLE GLAZING BENEFITS THINGS TO KNOW BEFORE YOU BUY

Day-evening ordinary degree, DNL or LDN: This measurement assesses the cumulative exposure to sound to get a 24-hour time period (Leq more than 24 hrs) from the year, which has a 10 dB(A) penalty or weight additional to nighttime noise measurements offered the greater sensitivity to noise at nighttime.Create a soundproof wall: Natalina on Instruct