It would make about as much noise as it makes now. Nearly all the noise of a commercial aircraft is caused by the air being pushed to propel it, not by the engine internals.
(You can reduce noise and increase efficiency by pushing more air at a smaller speed. You do that by having more engines or larger ones. I would expect electrical planes to have more engines, but that's a small secondary effect.)
It would make about as much noise as it makes now. Nearly all the noise of a commercial aircraft is caused by the air being pushed to propel it, not by the engine internals.
(You can reduce noise and increase efficiency by pushing more air at a smaller speed. You do that by having more engines or larger ones. I would expect electrical planes to have more engines, but that's a small secondary effect.)