Sliding doors that are reasonably sounds proof

[WannabeMathematician]

So we are getting some work done and it would be good if we could have a sliding double door between two rooms rather than ones that open out. We’ve been told by our designer that there are no sliding doors that are sound proof enough to go between two bedrooms so the plan is a non starter.

Does anyone know about any reasonably sounds proofed sliding doors before I write this idea off completely?

We will install a sliding door in our project. Small flat with DS bedroom right at the entrance area and near the Living room/TV.
The doors are not so much the problem, just the hollow part of the wall that houses them when the door is open. The architect suggest we use a plaster board with sound insulation or a sound proof membrane before a the normal plaster board. We will check with the builder what is easiest/better. We will be sound proofing the ceilings as well. So it will depend on the overall scope of the sound insulation.

I currently have a sliding door in my bathroom and yup, you can hear everything! I will have to get it insulated at some point.

Also do make sure the door has no gaps!!! (they come with a draft seal and I didn’t think it was needed to all in all sides, so it was not installed on the bottom bit 🤦🏻‍♀️)