I bet you can’t hear hollow tubes ring even when you put your ear right up to them. It’s an old wives tale. I know what you’re thinking - but if I strike the hollow tube with a small hammer I can hear it ring. Solution: don’t strike the hollow tube with a small hammer while music is playing. 😛 Sand filled speakers never really caught on either for the same reason. If you’re determined to prevent ringing more elegant solutions include wrapping 2” length of the tube with viscoelastic tape or sending the tubes in the cryo lab and/or filling about 1/8 of the tube with hollow fiber wool.
Equipment rack with hollow tubes.
Ive heard alot about filling equipment racks with hollow tubes with sand... What is the reason behind this ? For vibration ?