EPNdBEffective Perceived Noise in Decibels
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The NG34 technology development program is focused on advances to lower specific fuel consumption (SFC) by at least 15 percent compared to current engines in this segment, up to 15 percent lower cost of ownership and 35 percent margin to CAEP/6 NOx emissions and 15 EPNdB margin to Stage 4 noise requirements while continuing the CF34's 99.
The prospective NG34 engine would be expected to deliver a 10-15 percent reduction in operating costs, with 15-20 percent lower specific fuel consumption, a 50-60 percent margin to CAEP/6 NOx emission limits, a 15 EPNdB margin to ICAO Stage 4 noise limits, and 99.
The aircraft also operates well within Stage IV external noise requirements, establishing by International Civil Aviation Organization (ICAO), having been certified with a cumulative margin of 33 EPNdB.
1 EPNdb on takeoff with a slight improvement on approach; lower emissions through lower cruise thrust; lower operating costs by reducing block fuel burn 5.