RE: Engine noise
Its interesting that in my 50+ years working in the RF field I never heard of an RF leak. I guess I will have to add that to my vocabulary.
The OP does not define what he is seeing. We don't even know what he is getting but several have jumped in and repeated the old school fixes none of which works.
There is another problem caused by a running engine. Its called vibration. It could be causing what he is seeing. But then we don't know what he is seeing so maybe we should not guess about that either.
Another problem with a running engine is the sound pressure it generates
When trying to fix a problem we should first identify what the problem is.