DIY Horn Damping

Warning, involves drilling holes in the horn.

Altec Damping

Altec Damping 2

Altec Damping 3


It's a pity the work will be hidden from view.


P.S. I have found for domestic use that self-adhesive damping sheet does the job just fine and no drilling required.

I agree with you, i use self adhesive sheets meant for cars, worked well.