Ask the Gentle Giant. He knows all!

No, but seriously... I think all of the convection ovens are a bit
noisy. I prefer to go medeival and roast wild boar on the spit in my
backyard while listening to Genesis...

I recently installed QuietRock, which is a sheet rock product designed
to cut down on sound transmission. Maybe you could install that in
between the oven and the cabinetry? Maybe not...

No $100 needed for that advice... Thanks for the great GG site, Dan...