Mines so noisy too! Im so paranoid to go anywhere quiet since surgery.. and I feel like I cant rely on a GasX pill, it just doesnt give me the assurance a belt would give me.
Totally understand I'm paranoid too and I tried everything including oven mitts and foam but nothing works. I haven't tried these but stoma stifler sounds pretty good.
I have a stoma plex guard I'd say it helps a little but will not prevent noise all together. For me it was certain foods to avoid on my public outings.