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What Does Secondary glazing Mean?

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Day-night time typical level, DNL or LDN: This measurement assesses the cumulative exposure to sound for a 24-hour interval (Leq over 24 hrs) on the calendar year, that has a 10 dB(A) penalty or body weight additional to nighttime noise measurements offered the improved sensitivity to noise during the night https://acousticperformance11840.bloggip.com/31996337/not-known-facts-about-soundproofing

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