Noise level of jetsurf boards

I’ve read the new jetsurf models have a silencer and give off 59dbs. .what were the old models at and what is the new electric model at

They are all noisy, more or less. Obviously electric ones are less noisy but still you can hear it loud and clear.

Only efoils are not noisy at all - you can ride and talk. There is a still little sound of the motor but not noisy