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We are considering allowing helicopters on our private airstrip (2600 ft strip). Noise on the ground (and approach) is the concern from the community.

Does anyone know approximate dB ratings for a typical 2-4 seat helicopter vs. a 2-4 seat fixed-wing propeller aircraft? I know there is no exact comparison, but just an approximation would be helpful.

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  • $\begingroup$ This question is too broad as asked. Noise signatures vary. A helicopter could be a robinson or an MD 500 or a Long Ranger. $\endgroup$ – KorvinStarmast Oct 3 at 19:11
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I notice your question has been unanswered for some time, now. I avoided an answer due to not having any experience or data comparing the two (As far as amplitude of noise). I can say that the frequencies of the noise are different. Engine noise /freq are roughly the same for both FW and RW. FW props produce a blade pass freq of #blades x rpm and for the size of aircraft, props and tail rotors are similar in frequency. The big difference is helicopter main rotor noise is much lower in frequency. The fact that the main rotor is producing the lift AND thrust is another thing to consider.The other thing is that helicopters operate at relatively higher power during approach and landing. You might get a phone sound meter app and go to an airport and compare. hope this helps.

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