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Questions related to aviation sound noise or regulations thereof.

4 votes
1 answer
806 views

What's the EPNdB for large turbofan engines for stage 5 noise regulations?

I'm trying to estimate the Effective Perceived Noise (EPNdB) of the GE9x. GE Aviation says that it will be within 8 dB margin of the stage 5 noise regulations, can anyone confirm that? …