What i think? Hm, maybe you don't want to know,
But i have an advise: study what general types of muffler types / absorption systems are used in the automotive industry.
And i have a hint for you; Porsche 986 mufflers are reflection silencers,
So before designing st… thiings and putting a Copyright on a sh… diagram, you should first do a little homework.
Just my 2 cents…
Regards