Please review ventilation topics on this forum. If "over the oven" refers to a cabinet mounted wall oven, the options are limited. Commercial systems are called eyebrows and hang over the oven. These might not look acceptable in a residential kitchen. One can put a largish register in the ceiling and vent it through a separate system from the ventilation hood over the cooktop. Effluent from the oven will, however, spill into the kitchen when the oven door is opened, and this ceiling system will only remove it by air changes because it has no direct capture capability. Some enterprising high-end oven manufacturer should provide an outlet that can be connected to heat resistant insulated ducting and design the oven's convection cooking fans to eject enough internal air when the door is opened to minimize effluent into the kitchen. Presently, the Wolf (for example) just shuts the fans down to keep from blowing hot air into the cook's eyes. kas

The requirement for "high" is a larger aperture to capture the expanding effluent. The flow rate has to increase in proportion to the larger aperture area, but it does not have to increase to "suck up" effluent from the more distant cooktop because it won't at any flow rate anyone would imagine using. Quiet ventilation (to the extent that that word pair is not an oxymoron) requires a large fan operating at a low rotation rate (think Casablanca type ceiling fan as an extreme). Some compromise can be had by remote mounting, oversizing the fan and normally running it at reduced power, use of a silencer, duct padding, etc. MUA is widely covered in this forum and should be searched out before asking tailored questions. kas

I have GE Profile ovens (Trivection & convection on top, convection on the bottom). There are actually four fans...the convection fan that moves the heated air around during convection baking/roasting & Trivection speed cook/broil, the fan to keep the internal electronics cool, the fan to cool the oven down, and the fan to keep the controls cool (top oven only). (The second and third may be the same fan as it's on when the oven is on, regardless of cooking option, and when the oven is turned off.) Yes, you can hear them, but they're not loud and like LowSpark, I don't really notice them. I'm usually in the kitchen while they're running, I still don't really notice them. One thing I do do is open the ovens to let most of the heat out immediately. I started doing it for the top oven so it would cool the control panel more quickly and then must started doing it for the bottom as well. However, my ovens open into a sort of corner and most traffic goes around them. The only time they're in the way when open is when I need to get into the pantry. I just leave them ajar then instead of wide open.

Except when the hood is on max, every applliance in our kitchen Is extremely quiet and that includes two dishwashers, and even though we went with a combination of brands, their handles and looks all match, and also match our pulls. Now back to OP’s question, our JennAir double wall microwave and oven combo JMW3430DP (Pro Style Euro Handles) is very quiet and love its completion jingle, else we’d not even notice it was on. It is super fast and took us a few days to get used to how fast the main oven heats. Even the microwave is a full oven with broil capability etc. Our JennAir range also has two ovens. DW loves cooking and she compliments the kitchen every time she cooks; that’s huge for me. For us, it was imperitive every appliance be super quiet, else, due to the size of this house and hard floors throughout, even the slightest of sounds seem to amplify. As everyone should too, we did a tremendous amount of research into reliability, function, features and aesthetics of everything we bought. Below is a pic, you can see the double wall oven on the far right; the cabinet also has a JennAir warming drawer on the bottom.