No, a jet engine is louder.
yes
from a distance away why does a jet sound loader than a lawn mower
Well, there are many reasons but the main one is the jet engine is many times larger and more powerful.
from a distance away why does a jet sound loader than a lawn mower
The sound of a jet engine vibrates more than the sound of a lawn mower.
drill holes in muffler
No
it will get louder
drill holes in the pipe
The advantages, you move over a lot more land in a lot less time. The disadvantages, Jet engines use a lot more fuel, and are a lot louder.
Diesel trains are louder than electric trains because you the noise that the diesel engine makes, which is louder than the electric engine.