We are measuring small voltages from high quality microphones and have massive issues with interference. We have tested all equipment in a different building and there everything is working perfectly.
Now the issue may come from the building that we have to work in being surrounded by massive 10 m long steel plates, which of course are a magnetic interference source because they slightly move. The induced voltages can be up to 1 V peak peak
How can this be overcome? At the moment we are working with high quality shielded BNC cables and make them as short as feasible. Can a balanced wiring (how would that be done?) help? We cannot conduct the trial somewhere else.
Thank you in advance,
Michael
