N1FFF, I work as a Minor Offences in Residence Ordinance and Noise officer for my local council, and have performed this job for over a decade for several councils around the country. If you want this sort of anti-social behaviour dealt with then I suggest you start taking the time to do the following:
- Place pieces of tape (or "Blu Tac" - you can get this at most stationary stores) around the foot of your furniture on the flooring and against any adjacent walls. This will allow you to measure the distance these objects move after the disturbance
- Hang a plumbob from the ceiling in the room of the disturbance. This will allow you to exactly pinpoint that it is the wardrobe making the vibration.
- Pin pieces of paper (again these can be purchased from most stationary stores) against the wall NEAREST to the disturbance in a vertical line from ceiling to floor (or floor to ceiling depending on what is easiest). This will again provide further evidence that the vibration is coming from the wardrobe.
- Purchase an OMNI-DIRECTIONAL microphone (these can be purchased from most Music stores) and place it in the exact centre of the room. It is vitally important that this is placed correctly, so please use a measuring tape (this can be purchased from most DIY stores). Hook this up to your laptop (you may require an interface - these can be purchased from most computer stores) and set it to constantly record. This will again give you exact direction for the disturbance
To verify that the disturbance is in fact coming from where you say it is, the officer will need to verify VISUALLY and AURALLY that the disturbance has taken place. For this reason I recommend setting up a webcam and recording the room, or failing that make sure the officer comes round when the lady upstairs is getting dressed. The recording (which should be VISUAL - the video, and AURAL - the microphone) should show the officer the plumbob and paper moving, along with the microphone providing directional audio for the accurate location of the disturbance and it's dB (decibel) level. You can also point to the movement of the furniture (the tape, "Blu Tac") as evidence of the disturbance but only in
conjunction with the other evidence.
This process of investigation can take time, so if you are able to present recordings it can help. Also note that this process is not usually done free-of-charge (although some councils will provide this) so expect to pay in the realm of around £200 for the investigation. You can usually recoup this from the resident making the disturbance once the investigation is found in your favour.