There is a school of thought that adding anything to your bow will in some way, sometimes big sometimes small, effect its efficiency.
Is your bow / arrow set up properly tuned.
Brace height , right string strands/ length, arrow weight.
All these will effect bow noise and hand shock.
Do you know if your bow a dynamic tip or static ?
Can effect noise too.
I personally use a small tuffed of lambs wool top n bottom on my strings, I just do! but my bows are nearly silent without any silences just because I spent a lot of time tinkering with set ups.
YMMV
Keep playing.good luck.
Kevin