mapman
13,945 posts
11-10-2016 3:14pm
Gk get your details correct. I said water will show vibrations. I did not say the source is seismic. Could be the gear itself, people walking on the floor, from speakers, nearby appliances. Whatever. These are all possible variables but each case is different. Only way to know is to try. Also just because vibrations are present does not mean the sound will be affected. The only way to know these things in each case is run tests and see and hear.
Huh? What I said was when you isolate the equipment you will see the ripples in the water disappear. That means that it actually is the seismic type vibration that’s producing the ripples. If you can’t see that it’s too bad. If you had been paying attention you would understand that by seismic vibrations I mean any type of low frequency vibration coming up from the floor. But not acoustic waves (airborne vibrations) or vibrations induced by the equipment, e.g., motors, transformers, whatever.
Footfall, Earth crust motion, ocean tidal forces, subways, traffic, speaker vibration feeding back to the electronics - all of those things I include in "seismic type vibrations." You may substitute the phrase "structureborne vibration" for "seismic type vibration" if you like. In any case, when you see the ripples in the glass of water disappear - now try to follow me here - that’s a sign that the problem is almost entirely the vibrations coming up from the floor, NOT the vibrations induced by the component or the airborne ones. Follow?
