perceived noise decibel


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perceived noise decibel

n
(Units) a unit for measuring perceived levels of noise by comparison with the sound pressure level of a reference sound judged equally noisy by a normal listener. Abbreviation: PNdB
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The ICAO Committee on Aviation Environmental Protection (CAEP) comprising ICAO member states, industry, and environmental non-governmental organizations, reviewed technological feasibility, environmental benefits and economic factors and reached a consensus to move forward on a new standard that will result in a reduction of 7 Effective Perceived Noise Decibels (EPNdB) compared to the current Chapter 4 Standard.

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