Any suggestions to dampen the sounds of a colostomy bag?

[Rich76]

My brother has terminal rectal cancer, and he has a colostomy bag. He feels humiliated in quiet waiting rooms with other people when his bag starts making fart sounds. I'm trying to find a material to enclose his colostomy bag to dampen the sounds. There's a company that sells neoprene foam inserts to place in front of the colostomy bag, and so I bought a neoprene foam roll, and wrapped a smartphone playing fart sounds but the sound dampening wasn't much, even after I wrapped it a few times.

In addition to neoprene foam, AI has suggested closed cell foam, sound dampening blanket, microfiber cloth, and a few others but I'm beginning to think that nothing is going to be effective given the circumstances. Does anyone have suggestions on what we should try?

Thank you

 

[Tom.G]

I think you essentially want a material with a labyrinth of small air channels/pockets, with a wrap that helps hold it in shape and position.

Maybe a fabric that has a pile an inch or two long, often called fake fur.
If you try a double layer, make the fuzzy sides face away from each other.
Then cover it with a fluffy hand towel if needed.

To avoid sound leakage, you may have to tape any covering to his skin.

Give your brother our regards,
Tom

p.s. Please let us know if you find anything useful, we like to learn too!