Originally Posted by
R3K1355
Usually they require the complainant to keep a diary for a month or two detailing the noise, then they might fit sound measuring equipment to keep a log of the noise and time.
Most councils operate a mediatory service as well, where both people are asked to voluntary attend and actually talk to each other about the noise, IIRC if the person complaining doesn't attend the sessions the complaint can be dropped (that usually weeds out moaning old women and curtain twitchers)