I was just wondering if anyone is able to help me. I need to find out, what is the maximum decibel noise level of a stage 4 rated engine (as defined by the Federal Aviation Administration)?
Some more information: I need this information because the General Electric Honda HF120 engine has a noise level rating of stage 4. This is a small turbofan engine that is designed to be used on small business jets, such as the HondaJet. I have tried searching all day, but I cannot seem to find anything.
Thank you for your time and any help would be greatly appreciated.