Most contractors will use 1 4 to 3 8 plywood as an an extra layer or underlayment over particle board before installing carpet.
Can you install carpet on plywood.
Use a utility knife to trim any excess carpet from the wood surface if needed.
There will be way to much flex and give even with plywood.
Apply the carpet adhesive to the plywood in an even layer with a sprayer brush or trowel.
Carpet tiles can adhere to concrete plywood or particleboard subfloors.
Install carpet pad so that any seams will be at right angles to those in the carpet.
Carpet can be installed over particle board.
It just needs something in between.
However we highly recommend removing existing flooring.
When prepping your installation site make sure the that surface is.
Use a staple hammer tacker to fasten the carpet pad against the edge of the tack strip.
Plain plywood often is used as the subfloor in a home and this subfloor usually is concealed with a more durable and attractive covering such as wall to wall carpeting.
Coat the back of the carpet with adhesive if so directed by the adhesive manufacturer.
There are some sound dampening underlayments made of cork or rubber to limit noise transmission under wood or tile flooring but it sounds like you have been told no on that already so i think you may be stuck.
Tape neighboring pieces together with 2 to 3 inch masking tape or as directed by the manufacturer.
Don t even try to put flooring on top of carpet.
Press or walk on the carpet to adhere it to the wood surface.
Place the piece of carpet adhesive side down onto the wood surface.