Vibration dampening downstairs neighbour machines

Hi, at my studio complex (300 sqm recording, mixing & mastering on 1. floor) we have a problem with our downstairs neighbour (ground floor). A factory where they use some rewinding machines like these: http://www.cga-converting.com/media/upl ... c30cc6.pdf http://www.cga-converting.com/media/upl ... d95b9c.pdf When in use, they make a subfrequent noise at our floor by flanking transmission. It's a noise that goes from about 20-40 Hz. The machines are standing on concrete with a 1-2" rubber pad between the machine foot and floor - which surely isn't enough dampening. What kind of vibration dampening would be most efficient to isolate the machines from the building and reduce flanking transmission through the concrete/steel building? Unfortunately I don't think traditional spring mounts is stable enough for these machines' mass point. Cheers /Kibek

Hi Kibek. Please read the forum rules for posting (click here). You seem to be missing a couple of things! :) For that type of problem, I totally agree that rubber is not the solution, and is mostly not doing anything at all to isolate the machinery. You need proper spring vibration mounts, correctly tuned to the equipment. You might want to contact someone like Mason Industries, Kinetic Noise, or Vibrodynamics, and see what they say. http://www.kineticsnoise.com/hvac/spring_isolators.html http://www.mason-industries.com/masonind/ http://www.vibrodynamics.com/english/eng-home.html

Unfortunately I don't think traditional spring mounts is stable enough for these machines' mass point.

Spring mounts is exactly what you need! But correctly designed spring mounts, such as those made by the manufacturers listed above. (There are plenty of other manufacturers: those are just three well-known ones.) - Stuart -