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i have done a project where the system is affected by noise n we tested it in different noise environments n with different frequncies. could anybody pls tel me wat kind of testing is it called?
In communications that might be considered security and dependability testing, mostly addressed by IEC 60834-1. I'm not entirely sure what you're testing though.
You may also be doing something more like type testing (or at least what the company I work for calls type testing) where you're looking at whether the operation of the device is disrupted by different external factors (i.e. Shock testing, Vibration Testing, EMF testing, ESD testing, RF Emissions testing, etc.).