We don’t know anything about the building but it seems the matter is being progressed. The noise was noticed a month ago and reported some time after that. Making a CTTT application will have at least one effect – bad blood between people in the same building! where it is likely it will be resolved anyway. Mattb’s advice is sensible.
CTTT applications cost money and time, and not just to the parties, we are also paying for it through our taxes – use that avenue when it is really necessary.