ORIGINAL: bzyguy01
My local club has a noise level max of 100 DB. Thats not bad I know but I want to know how to properly test??? Do I stand 90 Deg and point the bird toward the wind (if any) and how many feet away is the correct way?
I beleive that the guys at the club are just walking up anywhere between 5 and 10 feet away around 90Deg at the side with the meter pointed directly at the engine and have the throttle full open while sitting on asphault??? Is this right? If I were on the grass and had wind to help, the DB's would measure much different.
I hope that I posted this in the right area as I have had no luck finding answers to this in existing threads nor on AMA's website. I found some stuff but it pertained to certain competitions.
Thanks guys
Shayne
I see your club has a max noise level spec, from your first sentence. Wherever that rule came from should be the place to look for the measurement method. If the source of the rule does not spell out the measurement procedure, then the results are subject to debate.
What is your purpose? Do you simply want to measure your plane for compliance with the club rule? Or are you concerned about noise complaints from neighbors?
If you have concerns about neighbor complaints, the place to measure sound levels is in the neighbor's yard. The noise heard there should not interrupt conversations.
Good luck,
Dave Olson