Generator quieting
A while back someone mentioned looking for a quieter muffler to reduce the noise of their gen. That question brought to mind that a video needs to be made which should clearly show that much of the...
Forum Discussion
SaltiDawg wrote:
Thanks for the reply. I was not asking about your conclusion re the exhaust.
I again simply ask, "What is the mechanism that you hypothesize for "internal vibration of the engine" to be seen as airborne noise?"
The fact that this happens is not obvious.
I would ask in a little more depth, but I'm afraid that my "credentials" would be again questioned.
Simple, the engine case resonates.
Anything moving inside makes small vibrations.
Those vibrations in turn are coupled mechanically to the case.
The case then vibrates.
Case vibrations move air particles that are against the case.
Air particles then vibrate the adjacent air particles..
Works a lot like a speaker.
Imagine dropping a small drop of water into a bowl of water..
The drop creates waves that radiate out from the original drop.
