This is a small and exquisite adjustable damping earplug that I designed, specifically for concert audiences and musicians. It can achieve a relatively linear decibel attenuation effect - from almost no damping to moderate damping
All you need to do is pair it with a standard silicone or foam earbud set that you like and find comfortable to wear.
Adjust the noise-canceling level by rotating the knob: I designed the knob to be relatively loose, making it easy for you to adjust directly in your ear. However, the specific operating experience will vary depending on your 3D printer.
Moreover, I have thoughtfully designed a compact storage box that can hold two earbuds.

Wish you a pleasant experience and always take good care of your ears!